We have a legacy C program running on our HP3000's requiring maintenance due to a change in the files used for input.

The files used for input are fixed ASCII with max rec nums (flimit) of over 4,000,000; previously, the flimit of the input file was 2,000,000 or less.  The C prog copies the input file, opens that copy in write mode (essentially copying the format of the input file for output), then writes out records to the output file.  Now that the input files' flimits have grown, C is unable to write to the output file after opening the file in write mode.

This is the line that fails, where "argv[2]" holds the output filename:

fopen(argv[2],"w")

Using different modes for output ("w+", "wb", and "wb+") do not fail as "w" does, but the output is in an unusable format.

I don't know whether the problem lies with the C prog, i.e. limit of a stream buffer, or with some limitation on the HP or with MPE.  Is anyone able to offer assistance?  Alternatively, though not ideal, if I could make some kind of call to MPE from the C prog to alter the flimit of the input file prior to the copy, I could avoid the problem.

Thanks in advance!
Beth Elam
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