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[issac1029]

Hi all,

I have a question that how the envioment allocate address to the 01 fie-222? The address is allocate at the beginning of the program run? or when a 'read FILE' is issued it is allocated? I think this address would not change through the whole process of the program?I used to encounter a strange things that a 01 layer under qsam's fd can be initialize,but a vsam can not be,or unexpected data error would happen,Why this happen?

FD FILE
01 FIE-222
05 FF-33
05 EE-55

[programmer1]

The fields/variables defined in the FD section are nothing but temperory memory allocation made for the program.

This memory would be used to store the individual records read/to-be written from/into the file.
_________________
Regards,
Programmer

[issac1029]

But there should be address for them?Right?like the working-area.How does program allocate temperory storage and where to allocate?