[Mono-winforms-list] help needed on gdiplus error on app startup...

[Sebastien Pouliot]

On Mon, 2010-03-22 at 13:15 -0800, KFD wrote:
> My first attempt on porting a .net 3.5 app to mono...
> 
> MoMA says no porting issues, so I attempt to run using new install of mono
> 2.6.3...
> 
> and get the following (snipped for brevity)...
> 
> System.ArgumentException: A null reference or invalid value was found [GDI+
> stat
> us: InvalidParameter]
>   at System.Drawing.GDIPlus.CheckStatus (Status status) [0x0009d] in
> C:\cygwin\t
> mp\monobuild\build\BUILD\mono-2.6.3\mcs\class\System.Drawing\System.Drawing\gdip
> Functions.cs:219
>   at System.Drawing.Bitmap..ctor (Int32 width, Int32 height, PixelFormat
> format)
>  [0x00017] in
> C:\cygwin\tmp\monobuild\build\BUILD\mono-2.6.3\mcs\class\System.Dr
> awing\System.Drawing\Bitmap.cs:97
>   at (wrapper remoting-invoke-with-check) System.Drawing.Bitmap:.ctor
> (int,int,S
> ystem.Drawing.Imaging.PixelFormat)
> ...
> 
> 
> For some reason, the build path seems to be under my Cygwin directory, but
> when I look under c:\cygwin\tmp, there is nothing there, so I cant check out
> the source where the exception is occurring...
> 
> Anyone have insight into this error, and/or where the missing source files
> have disappeared to?

The file names/paths are stored in the debugging symbols - which are
created at compilation time. If you installed the binaries only then the
file simply don't exists on your system.

> It looks like mono GDI+ dll hasnt been loaded/initialized yet?... 

Possible but unlikely as the exception would have occurred earlier
(there are calls to GDI+ before that). Sadly GDI+ does not report much
details on failure so you have a bit of testing to do.

Try adding some output on the console about the parameters (width,
height and format). My guess one of them is not valid (e.g. 0).

Sebastien