Calibre MTflex PERC LOAD remote host acquisition discrepancy.

IC Verification & Signoff


PERC LOAD MTflex run fails in various stages of the PERC flow. All MTflex cases are affected, other non-MTflex running as expected.



When running “PERC LOAD” MTFlex job run fails during different stages inconsistently.

The tail of the log file will show an MTFLEX RUNTIME ERROR similar as the below:
MTFLEX RUNTIME ERROR: release_remote() : Release remote : sj-sc9-s22 (pid=169686) FAIL, ID = 235 TIMESTAMP = 339
<DCA 340 0 9 N sj-sc9-s22 ....>

Fatal error (signal SIGSEGV) - crash handler invoked

Stack trace:

Root cause:

When you acquire remotes for P2P/CD runs with Calibre PERC, the remote command (usually found in the launch remote script) looks something like this:
rcalibre /proj/out 0 -mtflex $CALIBRE_REMOTE_CONNECTION -64
rcalibre /proj/out 0 -mtflex $CALIBRE_REMOTE_CONNECTION -64
rcalibre /proj/out 0 -mtflex $CALIBRE_REMOTE_CONNECTION -64 -f

The root cause is a tool bug in the "PERC LOAD" with MTflex that causes the remotes to be lost when there is a job running in the background and can't bring it again in the foreground.


  1. Bug fixed starting from Calibre version 2023.3 and beyond. PRESERVE REMOTES is now enabled by default, so users can run with the same remote acquisition command for both P2P/CD MTflex and MTflex of PERC LOADs.
  2. Workaround by adding "-f &" for every line in the remote command and "wait" at the end.
    rcalibre /proj/out 0 -mtflex $CALIBRE_REMOTE_CONNECTION -64 -f &
    rcalibre /proj/out 0 -mtflex $CALIBRE_REMOTE_CONNECTION -64 -f &
    rcalibre /proj/out 0 -mtflex $CALIBRE_REMOTE_CONNECTION -64 -f &

KB Article ID# KB000121445_EN_US



Associated Components

Calibre PERC