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Configuration File VIs give refnums that are not refnums

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I am currently using LabVIEW6.1 and have little trouble with this refnum business. Configuration File VIs give refnums that are not refnums. I check this by using the comparison function "NOT A Number/Path/Refnum?" . The same thing happen when I cast a numeric to refnum using "data log file refnum" as the data type.
Thanks,
tc phan
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Configuration File VIs give refnums that are for other Configuration File VIs only. The refnum is created by type casting a numeric.
These refnums are incompatible with the File IO refnums for various other file operations.
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Config File refnums are not actual file refnum to the config file but a refnum to config data in memory. You can't use it for file operation. "NAN/P/R" will always return TRUE.
To test if a config file refnum is valid, use "Not a Config File Refnum.vi".


LabVIEW, C'est LabVIEW

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Thanks alot! Jean-Pierre.
regards,
tc phan
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