Question:
./webx-run error: Is Web Crossing already running as process 4251 Could not acquire a record lock on "/webx/webx.lock". Use 'make quit' to stop Web Crossing. System error [Resource temporarily unavailable]
Answer:
Because Web Crossing wasn't properly shut down, a file named "webx.lock" was not removed. This file can be found in your root "webx" directory where the server binary resides. Delete this file, and then restart.
"webx.lock" is used to prevent multiple webx processes from running the same database which would corrupt it.