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Problem with AND operation in script

Created by: AlfonsoAD at: 9/27/2006 5:47 PM (2 Replies)

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9/27/2006 5:47 PM	Rate (0)
AlfonsoAD Posts: 8 Rating: (1)	Hi everyone. Using WinCC Flex 2005 Advanced, I get an overflow error in the next script: Dim P,Q,R P = SmartTags("Value 1") 'Value 1 is a DWORD external tag Q = SmartTags("Mask") 'Mask is a ULong internal tag R = P And Q ... I only get the error when one of the tags has its most significant bit set. It's surprising because I think that any And operation doesn't have to result in a overflow, and the two tags have the same size (32 bits) Any suggestion? Thank you.
AlfonsoAD Posts: 8 Rating: (1)
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9/27/2006 10:01 PM

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Nemo

Posts: 3149

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Hi,

microsoft is telling this :

Fixed Precision Data Types
Type	Description
DWORD32	32-bit unsigned integer
DWORD64	64-bit unsigned integer
INT32	32-bit signed integer
INT64	64-bit signed integer
LONG32	32-bit signed integer
LONG64	64-bit signed integer
UINT32	Unsigned INT32
UINT64	Unsigned INT64
ULONG32	Unsigned LONG32
ULONG64	Unsigned LONG64

your datatypes differ a little bit....

nemo

9/28/2006 6:16 PM	Rate (0)
AlfonsoAD Posts: 8 Rating: (1)	Thank you for your reply, Nemo. Apparently the two tags have the same size, as I can see in the Runtime Simulator (FFFFFFFF in hex is the maximum value) and in the Script Debugger. Indeed, I can't choose LONG64, INT64 or DWORD64 in WinCC Flex. I'm using a Pentium IV 3'0 GHz 32 bits. Might it be a bug? It's rather strange.
AlfonsoAD Posts: 8 Rating: (1)
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