Error [Join does not verify] when joining injected tables

• Join does not verify
• failed to build long key join
• failed to create join
• cannot add join

1. Check disk space  (Note: running out of disk-space will create a host of seemingly unconnected errors)
2. If working with injected data, check package data exists

Other possible causes:

The following error may be seen building a join if one of the injected fields has been hidden using Project | Show/Hide Hidden fields. 

Join does not verify

failed to build long key join
failed to create join
cannot add join