[netcdfgroup] possible reason for this mistake

Hi dear all,

I got the following error mesage when I run my FORTRAN program, do you have
a clue what can be the possible reason? Thank you.

     Error creating netCDF file
     netCDF error number   22  processing file
"^@^@^@^@G^@^@^@^F^@^@^@~mW^@"
     Invalid argument
     ^@^@^@^@G^@^@^@^F^@^@^@~mW^@
ncclose: ncid 0: NetCDF: Not a valid ID


Have a good day.

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Cordially,
Hongyan(鸿雁)
Tel: 1-519-8884567ext36667