Relationship classes greyed out and unable to select

[JamesBuckle]

Hello, I have a feature layer and two standalone tables. I want to create a relationship class between the feature layer and both tables using the common field 'pond_id'. I have all 3 datasets added to my map from the GDB.

However, the option to add relationship class is greyed out:

I am not sure how to get around this. There are other similar questions to this which have been answered in this forum but none have provided a solution for me.

thanks,

JJ

[Eugene_Adkins]

If you're working with an enterprise GDB, you could have a schema lock preventing the change.

[JamesBuckle]

Is there a way i can check that? I've downloaded the data as individual shapefiles/CSVs from an AGOL group which houses our data that is collected in the field.

[Eugene_Adkins]

If you're using shapefiles this is probably not the issue, but here is some documentation (you'll use Catalog):

Manage geodatabase locks—ArcGIS Pro | Documentation

[JamesBuckle · Accepted solution]

Turns out a relate starting with the table and connecting to the layer does what i need it to do so marking this as resolved