General Description: To analyze the path to a register's asynchronous reset pin in a custom analysis, I must enable the "reg_sr_q" option in the "Path Tracing" tab. However, if a previous analysis was run without this option selected, subsequent analysis runs will proceed as though the option was not enabled (regardless of whether or not the option is actually enabled).
This problem is currently under investigation.
To work around this issue, close the Timing Analyzer. When you reopen it, and be sure to enable "reg_sr_q" on the first analysis run.