Error creating ASInstance frmrpts.
An internal operation has failed: The oracle instance is not empty. Select a different location or remove the instance at this location.
What I've done:
First I successfully installed WLS and then Forms (software only).
Then called the config.sh script from the FORMS $HOME. I received this error on the first run of the config.sh so the instance DID NOT exist.
Then read more documentation and Support articles.
Cleaned up /etc/hosts to remove IPv6 entry and ensure full IP was ahead of loopback.
Cleaned up nodemanager.domains
Cleaned up domain-registry.xml
Tried several times since.