Does the line being created with the Offset Line tool have to be in the same geodatabase as the line being referenced?
Last Published: April 25, 2020
When starting an editing session and selecting the line being referenced, the Offset Line dialog will only give the user the option to select a template for a line that is within the editable geodatabase.
If the user starts an editing session in geodatabase A and selects a feature class from geodatabase B, a greyed out Finish button will appear when using the Offset Line tool.
Possible Workaround: Import the feature class into the same geodatabase as the referenced line.