Carl McNamee asked:
>When using the BUILD command to build a fixed length flat file is there a
>way to let the system assign the most efficient blocking factor
>automatically?

Yes, by skipping the Blocking parameter the machine will assign its idea of
the best blocking factor. Her is an example:
:build filea;rec=-10,,f,ascii;disc=100  or build
fileb;rec=10,,f,binary;disc=100

I hope this helps.