On Feb 8, 2015, at 11:17 AM, Johnny Billquist <bqt at softjar.se> wrote: On 2015-02-08 16:57, Paul_Koning at Dell.com wrote: On Feb 8, 2015, at 8:09 AM, Johnny Billquist <bqt at softjar.se> wrote: ... Local NFARs V8 DAP V7.1 Buffer size= 2064. OS=RSX-11M+ FS=FCS-11 DC=Yes Remote FAL V4.1 DAP V5.6 Buffer size= 636. OS=RSTS/E FS=RMS-11 DC=No What does DC=No mean? I think that is if it supports the CRC extension to DAP. It should either stand for DAP CRC, or Data Check. Pick one. :-) And I guess RSTS/E do not support that. Correct. There is a symbol for that flag in the code, but nothing references it. paul