The layer being used as the Clip Features has been used before and worked fine, so I assume the issue is the layer I am trying to Clip (Input Features) - I keep receiving the same error when running the Clip tool :
Error 999999: Error executing Function Invalid Topology [Topoengine Error]
The Clip tool has worked fine prior to this. After reading online similar queries regarding this error, the solution in the majority of cases was to change the Input Features to a shapefile - I have done this but receive the same error.
What is my best workaround for this issue?