Develop Reference

unity3d - delete file causes "attempt to write a readonly database UnityEditor.DockArea:OnGUI()"

I created a project in Unity, work a little bit on it. And then I tried to delete one of the scripts I created earlier, but every time I try to delete it a message shows up:
Fatal Error!
attempt to write a readonly database
UnityEditor.DockArea:OnGUI()
I tried to delete the file manually from the folder, but it caused similar error every time I launched Unity.
All the googling did not help me as long as all the answers are for the Windows, where permissions are easy to set up. For OS X only one answer was found, which said to make a folder shared, which also didn't help.
Does anyone know the solution of that?

I get this crash whenever I am trying to delete a file from my project or trying to create a build in unity. I am using a mac running sierra OSX (though I expect that won't matter) but the primary issue, is due to limited internal hard drive space, I had the project saved on an external SSD drive plugged into my mac. This seems to be the main issue. If your running into this issue and you have a similar setup, try copying the project file over to your onboard hard drive and operating it from there.
I have not yet found another solution around this problem. For some reason unity can save to external drives fine, but doesn't like to delete or build from them.

Try to delete all in folder
/Users/Shared/Unity/4.0_Angrybots/Temp

Error 1001 An error occured in sending the command to the application

COM Excel AddIn, C#, VS2008
The error happens occasionally when I install/uninstall my AddIn.
sometimes I see Error 1001 the specified file can not be found
Anyone know what causes these and how to fix? thanks
I use windows installer
http://msdn.microsoft.com/en-us/library/2w2fhwzz%28v=VS.90%29.aspx says if use [TARGETDIR], it should be like "[TARGETDIR]\" or "[TARGETDIR] ". I simply use /filepath = "[TARGETDIR]myinstallfile" in CustomActionData
What I do not understand is it works almost all time and fails occasionally
Also even if I change this to including space or backslash, I can't tell if that fixes issue since the issue does not happen every time. Anyone has experience? thanks

I found this and it fixes the issue though I am not sure I ever use DDE in my program
http://sympmarc.com/2010/02/04/microsoft-excel-error-there-was-a-problem-sending-the-command-to-the-program/

Then I found this http://www.opendylan.org/documentation/opendylan/interop2/inte_278.htm
It talks about COM Server
so I went to cmd, type in "Excel.exe /RegServer", then the error disappears.
I am not really not sure if this solution works for all cases.
In fact, I am concerned that I miss sth in installer.

Here is a Microsoft Support page related to an issue which looks quite similar to yours. So for me it looks like a bug in Excel rather than in your installer.
The article is quite large, but it boils down to making sure that:
your Excel app is not running with elevated rights
advanced setting "Ignore other applications that use Dynamic Data Exchange (DDE)" is unchecked
Other than that you might try to repair Excel installation or follow the advice given in this thread of ASP.NET forums to fix the registry for Excel installation.
I hope it helps someone facing similar issues.

If you get this type of error when uninstalling a VS setup project MSI, then the most likely reason is that TARGETDIR is not preserved between the install and the uninstall, therefore it has no value, and attempts to use it in an uninstall custom action will result in failure to find the file. The easiest solution (apart from always installing to known locations such as common files etc) is to save TARGETDIR to the registry and retrieve it later. In the VS IDE you can create a registry item with the value [TARGETDIR] to have it resolved at install time.

Using R(D)COM for integrating R with C#

I am trying to use R(D)Com interface. I have R 2.12.1 installed on machine. For using this interface in C#, I loaded rscproxy_1.3-1 package and then installed R_Scilab_DCOM3.0-1B5 on my machine. Also, I copied sciproxy.dll from Program Files\R(D)COM Server\Scilab to Program Files\R(D)COM Server\bin, as informed while installing the interface.
My Problem:
As a part of testing, I tried the code from blog post http://vvella.blogspot.com/2010/08/integrate-c-net-and-r-taking-best-of.html. But my form application failed due to exception raised by statement rconn.Init(“R”). The exception text was Exception from HRESULT: 0x80040013 I tried to run samples from Programs->R->R(D)COM Server->Server 01 Basic Test. On launched form, I clicked button “Start R” but it failed with error printed in text box as “Initializing R...Function call failed Code: -2147221485 Text: installation problem: unable to load connector”
I tried this:
I tried to troubleshoot it with the help of Index html page, and there under installation section, I found that there must be rproxy.dll under installed R/Bin folder. Also, HKEY_LOCAL_MACHINE\Software\R-core\R\InstallPath should point to installation folder.
Things lacking on my machine are
the installed R/bin folder doesn’t
contain rproxy.dll. Where can I get
this dll? Or is it sciproxy.dll
instead?
HKEY_LOCAL_MACHINE\Software\R-core\R\InstallPath
points to installation folder, but
there is no entry under
HKEY_CURRENT_USER\Software.
I can guess there is something fishy about installation, or registering COM server. But I am not successful in figuring it out.
Could you please tell me where am I going wrong?
thanks,
Kapil

Oh god I remember this being a huge pain in the arse. Lets see if I can remember... And before I start, I warn you that I just "got this working" and never cared to work out if I could remove parts from the process.
Downloads are available from http://rcom.univie.ac.at/download.html . If I remember correctly, the RandFriends package is all you need, it installs a crapload (just install it all) but is simple. Alternatively, I think if you install the 'rscproxy' package in R you can just download the 'statconnDCOM' and install that. Memory is hazy, but I know one of these methods results in an annoying splash screen everytime you run your C# executable, and one doesn't. Although that could have just been some setting I played with.
Now, I can't remember how you verify that stuff has installed successfully. Pretty sure it comes with examples though. Once that is started, get your C# project open. Reference the following projects,
StatConnectorCommonLib
STATCONNECTORSRVLib
In your code, you will probably want to implement a IStatConnectorCharacterDevice so you get the R output coming back out in C#. Your code to initialise will then look something like,
private StatConnector _StatConn;
private IStatConnectorCharacterDevice _CharDevice;
private Whatever()
{
// declare
_StatConn = new StatConnectorClass();
_CharDevice = new MyCharDevice();
// init R, wire up char device
_StatConn.Init("R");
_StatConn.SetCharacterOutputDevice(_CharDevice);
}
Then you should be able to just use the functions as needed
_StatConn.EvaluateNoReturn("x <- 3");
var returnObj = _StatConn.Evalute("1 + 1");
Hope that helps.
tl;dr download RAndFriends, do fresh install with that

I had a similar problem calling R.Init(), I found R.GetErrorText() returns the actual error message

Cannot create ADODB.Connection with complicated programming chain

Ok so this is a really complicated problem, I will try my best to explain.
We have a c++ application which communicates with Sql Connection like so:
CoCreateInstance(_T("ADODB.Connection"))
This works fine.
We recently made all of our backend code into a Com Object. If I write a Vb program to load our Com Object and do some database operations everything works fine, CoCreateInstance(_T("ADODB.Connection"))
still works.
We use fitnesse for testing so I wrote a fixture that:
1) Takes a string of vb code input into an html page.
2) compiles the vb code
3) runs the vb code that uses our Com Object.
* fitnesse is a java application so the code path travels through Java as well.
Now when any operation touches the database the Com Object hits an exception. Uses message boxes, and removing code I narrowed the problem down to this line of code:
CoCreateInstance(_T("ADODB.Connection"))
normally the return code is 0, but with this chain of code calling code I get the return code: 800401F3 which says that it cannot find the object to load.
I am pulling my hair out trying to figure out whats going on. Any bit of insight would be greatly appreciated.

It is telling you that it cannot find the ProgId in the registry. That's not very healthy, it is a pretty standard component on any Windows install. Verify this, fire up regedit.exe and navigate to HKLM\Software\Classes\ADODB.Connection
If that is missing then you need to install the dbase providers on that machine. Download the MDAC 2.8 installer from Microsoft and run it. If it is not missing then you have a more mysterious problem, perhaps something to do with this being a 64-bit operating system. Look in HKLM\Software\Wow6432Node then. Get additional diagnostics by using the SysInternals' ProcMon tool to see what it is poking at in the registry.

As an alternative, you don't say whether your com "object" is a .dll. If it is, then make sure it is either "self-registering" or you'll need to run this at the command prompt.
regsvr32 myobject.dll
If it's an exe with COM objects, register the objects by running the program with the "/RegServer" command line option like this:
myobject.exe /RegServer
HTH

CryptographicException: Couldn't acquire crypto service provider context

Reposting from http://www.mentalis.org/forum/thread.qpx/971 because I need an answer. I hope you guys can help me out.
The component in question is Org.Mentalis.SecurityServices.dll.
Hey all. I'm having troubles.
CryptographicException: Couldn't acquire crypto service provider context.
StackTrace:
at Org.Mentalis.SecurityServices.Cryptography.CryptoHandle.CreateInternalHandle(IntPtr handle, String container)
at ORG.Mentalis.SecurityServices.Cryptography.CryptoHandle.get_Handle()
at Org.Mentalis.SecurityServices.Cryptography.RC4CryptoServiceProvider.ctor()
at <place in my app where I try to create the RC4 CryptoServiceProvider>
I had to copy that exception trace by hand, from a screenshot sent to me by a client.
Essentially, I have created a .NET 3.5 WinForms application for XP that uses the RC4CryptoServiceProvider to load encrypted user details from an .ini file on startup. It's worked fine for months.
About a week ago, I got this exact exception message on my computer. I did some hunting online, but couldn't find much - everything I found was related to websites.
I eventually stumbled on a workaround that got things working on my computer. When I deleted the files from the following three folders:
C:\Documents and Settings\All Users\Application Data\Microsoft\Crypto\RSA\MachineKeys\
C:\Documents and Settings\All Users\Application Data\Microsoft\Crypto\RSA\token\
C:\Documents and Settings\my_username\Application Data\Microsoft\Crypto\RSA\token\
The problem went away. The folders re-populated with new information the next time I ran the application.
I had thought this was just something unique to my own development environment - that I had downloaded something weird that corrupted my cryptographic files and folders. It's not a field in which I am an expert - I just use the component, and it Just Works. Well... Up until now.
The problem is, one of my company's clients has just recently started experiencing the same error, and I'm not comfortable asking them to just clear out their Crypto files without being able to justify why. Also, it would seem that this wasn't due to something odd that I downloaded, as this exception is arising on a series of commercial Terminal Servers.
I've been looking around for support on this issue, but I'm not having much luck. I'll keep looking around. Can anyone out there shed some light on the situation?
Thanks for your time.

Do you know if your clients have the CSPs installed on their computer? Older versions of Windows won't have certain CSPs installed. It's also possible that they're running a foreign version of Windows that doesn't support strong cryptography (I'm thinking the French version might not be allowed to have all of them.)
Another possibility might be permissions. Maybe the process running the code is no longer running with administrative authority, or the authority associated with your account changed.

The Mentalis library should really be setting the CRYPT_VERIFYCONTEXT flag when calling CryptAcquireContext. Since they are not, each instance of RC4CryptoServiceProvider creates a handle to the default persistent key container (which is stored in the file you located with procmon).
Are you creating keys in multiple threads (or from multiple processes)? A wild guess would be that you are having some problems with locking of the file.