Improve error message on isolate transaction misuse
Improve error message on isolate transaction misuse

simolus3/moor,simolus3/moor,simolus3/moor,simolus3/drift,simolus3/drift,simolus3/drift,simolus3/moor,simolus3/moor,simolus3/drift,simolus3/moor,simolus3/moor,simolus3/drift,simolus3/drift,simolus3/drift