On Mon, 1 Aug 2011 13:50:09 +1000, Clement Clarke wrote: >If a data set has VB 133, 1330 and the program has FB 80,800 and opens >it for either input or output, the DSCB will be changed to that coded in >the program.
Not quite. If the data set is opened for input, the program will attempt to read the data set. If a block > 800 bytes is read, there will be a wrong length record error. Other errors might depend upon the access method used. The DSCB will not be changed, though. If the data set is opened for output, I don't know what happens if DISP=MOD. Is there an I/O error when the new data is written? If not there will surely be an error when the deat set is read with as either FB or VB. -- Tom Marchant ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
