Rebuilding Field List doesn't and deletes CONTACTS table

I have successfully repointed the three orange Table Occurrences to my contacts file. Triple checked!
When I try to rebuild the Field List, it doesn't. It deletes the CONTACTS table from the Table list, and leaves no fields showing in the Field List.
If I add CONTACTS back in using the [New Table] button, the same thing happens - it is immediately deleted again.
It all works perfectly when the 3 orange table occurrences are repointed back to your sample contacts table, but repointing back to my own contacts file does not work.
Using the debugger, it seems that an additional table is created, called - (that is a hyphen), then both - and CONTACTS are deleted in the [remove unused MergeTable records] script.
Any suggestions? Is it something to do with the fmSparkUtil.fp7 file being locked up even though your site specifically says that fmSpark is completely unlocked?
Or could it be that all my fields have a standardized labeling format _001_RecordID_n and if this is the cause, then why?
I've tried it on both my Mac and then on Windows, just to see if it made a difference.
When I try to rebuild the Field List, it doesn't. It deletes the CONTACTS table from the Table list, and leaves no fields showing in the Field List.
If I add CONTACTS back in using the [New Table] button, the same thing happens - it is immediately deleted again.
It all works perfectly when the 3 orange table occurrences are repointed back to your sample contacts table, but repointing back to my own contacts file does not work.
Using the debugger, it seems that an additional table is created, called - (that is a hyphen), then both - and CONTACTS are deleted in the [remove unused MergeTable records] script.
Any suggestions? Is it something to do with the fmSparkUtil.fp7 file being locked up even though your site specifically says that fmSpark is completely unlocked?
Or could it be that all my fields have a standardized labeling format _001_RecordID_n and if this is the cause, then why?
I've tried it on both my Mac and then on Windows, just to see if it made a difference.