what is the meaning of error code 137
I'm trying to backup the database into ldif file, and using the command as belows:
./ns-slapd db2ldif -D ../../../slapd-33389 -a /data/EXPORT/directory_services/offline/directoryDB.ldif -n InstallUpgradedata
But under some condition, it returned me an error 137, and killed some process. The first time doing the backup is OK, just the second time. I'm running it in my script. After got the error, I tested the command using command line, and it is fine.
Is anybody could tell me what is the error code 137 mean? Or where can I find it?
Thanks in advance.