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[sridevi]

I have a generic doubt in PL/1 . Can you please help to resolve that .

The requirement is :
We need to open a file , and if the file is empty write header data and the details to file . If the file is not empty we need to write the details only . We need to know the equivalent of I/O mode of cobol in PL/I . If we are decalring the file in update mode it allows to read and rewrite . It is not supporting writing of data to file . ( this is specific requirement for handling restart)

Is there any way to swtich between the modes within the program foe eg. Open the file in input mode , then followed by reading and close it . Later open the file in output mode and do the write .

Thanks,
Sridevi

[kolusu]

Sridevi,

why not pass a parameter to the program which will differentiate between between initial read and restart.

You can pass parms via linkage section or define a parm file.