We are still using the first version of ClearCase. Since the version 1.3.15 (July 7th 2013) of the Jenkins ClearCase plugin, it looks like 2002 versions are not handled anymore.

[JOB] $ cleartool -version
Rational ClearCase LT Client 2002.05.00 (Mon Oct 29 13:49:09 2001)
IBM(R) ClearCase LT Integration (R) Version 1.0 (5/30/00 Driver)
Licensed Material - Property of IBM
(C)Copyright IBM Corp. 2000 and others. All rights reserved.

cleartool 2002.05.00 (Fri Oct 26 20:24:09 2001)
Running cleartool setcs, this operation may take a while
[view] $ cleartool setcs -current -overwrite
cleartool: Error: Unrecognized option "-overwrite"
Usage: setcs [-tag view-tag] {-current | -default | -stream | pname}
FATAL: Base ClearCase failed. exit code=1
FATAL: java.io.IOException: cleartool did not return the expected exit code. Command line="setcs -current -overwrite", actual exit code=1
ERROR: null

I was able to fix the problem by adding the 2002 cases to the lines 64 and 67 of the CleartoolVersion.java file.

// Handle Clearcase 2002 and 2003 versions
if (op1 == 2002 || op1 == 2003) {
    return -1;
}
if (op2 == 2002 || op2 == 2003) {
    return 1;
}

Can you confirm this is a bug?

I made the correction on Github. I hope you will confirm it.