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JMoody
Joined: 26 Aug 2008
Posts: 20
Location: Ohio
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 Posted: Fri Aug 29, 2008 2:44 pm Post subject: Checkmate, .NET, C#, old FTN77 code and long strings |
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We are converting a FTN77 program to .NET in Visual Studio 2008. I am getting a memory overwrite somewhere in the code, so I am trying to use CheckMate instead of Debug as my complier configuration to see if I can find where it is happening. However, now that I have turned on the CheckMate option, I'm getting an exception "405: Reference to undefine character (/FULL_UNDEF)" when I run the program.
We are reading a file in C#, parsing the input into an object, and passing the object to our Fortran code.
| Code: |
FUNCTION ITEMCALC(TranInObj)
IMPLICIT NONE
OBJECT("McGill.FtnLibrary.TranInData") TranInObj
OBJECT("McGill.FtnLibrary.TranBackData") TranBackObj
OBJECT("McGill.FtnLibrary.TranBackData") ITEMCALC
CHARACTER SI*200
INTEGER*2 I
REAL*4 MYVALUE
DO I=1,200
SI(I:I) = ' '
ENDDO
SI = TranObj%SI
C-- Do calculations
CALL CALCVALUES(SI, MYVALUE)
C-- Return values
TranBackObj = new@ ("McGill.FtnLibrary.TranBackData")
TranBackObj%Value = MYVALUE
ITEMCALC = TranBackObj
RETURN
END
C----------------------------------------------------------------------
SUBROUTINE CALCVALUES(SI, MYVALUE)
IMPLICIT NONE
CHARACTER SI*200
REAL*4 MYVALUE
C-- Local Variables
CHARACTER TMPSI*200
C-- This is the line where I get the exception
TMPSI = SI
VALUE = 0.0
RETURN
END
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If I put a break point after the do loop in ITEMCALC and look at SI, the watch value shows 200 spaces and then some odd characters and no trailing single quote. This is the value in the watch:
Those characters change after the assignment.
| Code: | | 'NOTE VAL=10 INST X �ीૐॢ᱕뱏睐 |
Shorter character arrays show up fine. I have some that are 4 characters long, and some that are 50 characters long. All of those show up correctly in the watch window.
I get the exception in the CALCVALUES subroutine, where TMPSI=SI. I have replaced the assignment with this do loop:
| Code: |
DO I=1,200
TMPSI(I:I)=SI(I:I)
ENDDO
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and I get the exception when I=200.
Is this exception due to the odd characters after the 200th character in the string? It looks like the code is not finding the end of the array, or something of that sort.
Thanks,
Jill |
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LitusSaxonicum
Joined: 23 Aug 2005
Posts: 2388
Location: Yateley, Hants, UK
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| Posted: Fri Aug 29, 2008 7:35 pm Post subject: |
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Jill,
What you are doing is way outside my expertise, but as you have IMPLICIT NONE, don't you have to declare TranObj somewhere - you have TranInObj and TranBackObj, but no TranObj.
Eddie |
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PaulLaidler
Site Admin
Joined: 21 Feb 2005
Posts: 7924
Location: Salford, UK
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| Posted: Mon Sep 01, 2008 4:43 pm Post subject: |
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The code that you posted does not compile.
Otherwise I might be able to test it for you. |
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