Wrong use of "Scan From String" function in a while loop?

Hi,
I've got a "Scan From String" function inside a while loop. On the first iteration it converts correctly the number passed by the input string (for example 4) But on the second one it has only spaces (one or more \s) as input string.
I expected to obtain a zero as output (as it does always that it can not make any conversions, as I am supposed to) but indeed, i subtracts 1 from the previous number (according to the number indicated as example I would obtain a 3 as output)
What's wrong with this?
Does the function fails on this case?
The rest of the diagram o the VI is expected to manage a 0 on that situation, like others in which the conversion is not made.
Andres.

I have simplified the VI evading calls to other VIs and trying to reproduce the mistake.
The type of string I introduce to reproduce the mistake is:
clock 3 (30) clock (40)
Forgetting to introduce a number between the second "clock" and the following parenthesis, I would manage it programmatically with code that isn't included.
Then "Scan From String" is supposed to do not make a conversion. But it leaves a 2 as output (in this example)
I have realised, unbelievable but true, that it has matter with the number I substract to the output number (if it were 2, I would obtain 1 as output and so on)
Excluding that, I got the conversion made before as output, 3, on the second time that "Scan From String" executes. But, how can this func
tion as bad?
I am using LV4 on an old PC. I have tried to reproduce it with LV6 and it works. But it isn't desirable for me, I would have to convert a lot of VIs and surely I will find a lot of errors due to the conversion (I have already tried)
Attachments:
EXTCLOCK.VI ‏26 KB

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Hi,
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Attachments:
Scan.vi ‏12 KB

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Message Edited by mlang on 07-21-2008 09:04 AM
Attachments:
ScanFromStringError.JPG ‏27 KB
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"JB" <[email protected]> wrote in message
news:[email protected]..
> Wiebe@CARYA a écrit:
> Try "%[^,],%d,%d,%d". %[^,] scans all characters that are not ",".With
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Day of year bug - format date/time string and scan from string?

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TimeParseBug.vi ‏11 KB

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Wrong use of "Scan From String" function in a while loop?

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