In this section

ETL+ Installation Troubleshooting
Extraction Errors
Upsert Missing or Duplicating Rows
ETL+ Error Messages — Text of error messages reported in ETL+ log files or on ETL+ screens.
T-SQL String Constants (String Literals) — ETL+ target tables (tables and columns shown in the ETL Objects panel) only support string constants with single quotation marks, (not double quotation marks).