What does this error mean?

FATAL: could not launch or verify jserver

This error message usually means that the machine cannot resolve the host name, 'localhost', to the loopback address, 127.0.0.1. This is required for Schrodinger applications. You will need to make sure that you have a line like the following in your /etc/hosts file:

127.0.0.1 localhost.localdomain localhost

This error is also caused when you do not have read and write permissions on the following directory on the launch machine:

/tmp/mmjob.lock

This directory must have read and write permissions so that the following files can be created by Job Control:

/tmp/mmjob.lock/$USER
/tmp/mmjob.lock/${USER}.jserver

If these files exist, they must be owned by the appropriate user, and also have read and write permission for that user.

A third possible cause is if your job database is not owned by your user account. You must have ownership of the following directory:

$HOME/.schrodinger/.jobdb2

and all file and directories contained therein.

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