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I suspect you'll need to build your own "rules engine" constructed of routines. There's nothing in the Transformer stage that allows you to do what you're asking.

In a version 7 server job it can not be done dynamically. You will need to test each column pair individually and explicitly.

Could the jobs that failed to compile have been open in Designer or Monitor?

Are DEV and UAT separate machines? If so, check cron.allow on UAT.

What error did you get? If XMETA is corrupt then chances are that the login and security service can not function properly to determine your Information Server roles.

Why?

This information is deliberately not in the public domain, and the vendor reserves the right to change it at any time.

It has changed a couple of times in the past.

Server jobs can be run without reference to XMETA.

You set the cutoffs at the bottom of the match specification designer screen or, if you are testing the match specification, you can move the sliders on the histogram. m-probability is driven by the error rate you're prepared to accept. The default (0.9) indicates that you're prepared to accept a 10...

It might be better to ask IBM whether XMETA can be repaired/recovered.

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Meanwhile, the typical cause of error code -14 (time out awaiting start) is that you had at that time had too many processes running on the server. Presumably, for the successful run, there were fewer processes.

Not if XMETA is truly corrupted. You could try, using one of the command line interfaces such as dscmdexport, dsexport or istool, but I suspect that they're all doomed to a "failure to authenticate" failure.

Who informed you? (They may not know what they are talking about, not least because XMETA is not a file.)

Can you connect to the services tier using Web Console for Information Server? (http://machinename:9080 on 8.1 and earlier, http://machinename:9080/ibm/console on 8.5)

Welcome aboard. When's the interview?

Synchronized skydiving (or pool diving) also come to mind. I have not heard the term used in an ETL context. Is this an interview question?

Analyse what it does and write it as a parallel job having regard to issues like partitioning and sorting.