In the standalone package, "$unicode" is assigned a value that is dependent upon "$seqname" on line 7.
Since this variable is never updated, when users attempt to execute multiple instances of runI-TASSER.pl, temporary files are overwritten and/or deleted, which creates errors and unexpected behavior during execution.
Please move this assignment to somewhere later in the file (e.g., past line 232) so that people don't run into this problems when running multiple jobs on a cluster, and/or check for the existence of this temporary directory, give a message that you can't run two concurrent I-TASSER runs, and then exit.
Thanks!