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[vicente_garcia]

Hello list.

In a JCL I want to use a DDNAME to read some information only if the DDNAME is present.

In a C program, how can I check if an erron in fopen() is because

- the DDNAME in not especifyed

or

- the DDNAME is especifyed but with a non existent file ?

Enumeration of funtions and variables involved will be fine. A small sample code will be perfect

Thank you all

Vicente

[kolusu]

vicente_garcia,

You can use LE run-time option CBLQDA to turn of the dynamic allocation of file names. CBLQDA(ON) is the setting that dynallocs a (NEW,DELETE) file when an output DD name is opened but missing from the TIOT.

you can print of all of the LE run-time options in effect using "PARM=/RPTOPTS(ON)"

ie.

[vicente_garcia]

Hi Kolusu

Seems that JES checks for valid files in JCL prior it is run. So, fopen("DD:xxxxx") will return an error only if DDNAME xxxxx is not present in JCL.

Thankyou

Vicente