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[Anonymous]

I am attempting to call a fortran subroutine (in a .NET DLL) from a c# front end.

The fortran code works fine from within the Plato3 IDE on its own. But Visual studio gives a
"An unhandled exception of type 'System.StackOverflowException' occurred in Fortranbackend.dll"

I have shrunk the fortran subroutine down to following

SUBROUTINE LoadTest

REAL*8 HC(65341),HS(65341),CC(65341),CS(65341)


END SUBROUTINE

If I remove the above line and replace with smaller variable declarations, all is OK

This cannot be called from c# in Visual Studio Enterprise, but works fine in Plato 3 IDE.

Any Ideas what params I have to tweek in VS to be able to call my code.

Thanks

Mike

[Mike]

Just wanted to add my proper forums ID, now I have signed up (Previous message was posted before I joined the forums)

Thanks

[silverfrost]

The problem is that as the exception indicates you do not have enough stack space. Your arrays are taking 65341*8*4 bytes (2090912 bytes). I suspect your c# application has a smaller stack space limit than this -- from memory 1MB. You could try making the variables not stack based (i.e. make then common or in a module). Not sure if C# can increase the stack space.

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Administrator
Silverfrost Forums

[Mike]

Thanks for response. Dont really want to change the size of the arrays or re-jig the software, really need to use it as-is. However a bit of a crawl around the net and I found that you can re-size the stack size of the apps by using the

[big]EDITBIN.EXE /STACK:nnnnnnnn[/big] Utility.

Worked a treat.

[silverfrost]

Excellent solution

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Administrator
Silverfrost Forums

[criga]

Hi Admin,

you say "making the variables not stack based (i.e. make then common or in a module)".

How would you do that? Can you give an example or point to a reference ... I have the same problem with

parameter(maxne=45000,maxnn=25000,maxnz=30,maxnez=maxnz-1,
+ maxw=1000,maxpw=32,maxpt=2000,maxmk=10)

Thanks, Chris.