Build function on custom table not working.

I have attempted, in the data source section of an elasticube/dashboard to build with changes only on a custom table (green).  After 8 hours, the custom table continues to show "unbuilt changes" and at various intervals a separate table (brown) shows no data.  Rather "query error" noting no such table.  The table name has parts of the new custom table name, however, includes additional "A"s in the name.  The formula does not have these additional "A"s.  Is there an exact source to find the correct way to build with changes only for a custom table?  Being informed it is in a sisense video has not been successful to locate the appropriate steps.  Thank you.