If this template helps then use it. If not then just delete and start from scratch.
OS (e.g. Win10): Windows 10
PsychoPy version (e.g. 1.84.x): 1.90.2
Standard Standalone? (y/n) Yes
I added a new instruction Routine in the Flow, but the routine goes away from the Flow when PsychoPy is closed and run again. The Routine still is available in the builder window, but PsychoPy asks to add it again to the Flow.
The following message appears in the black Python.exe window.
“4.2010 ERROR A Routine called ‘b_instr_2_’ was on the Flow but could not be found (failed rename?). You may need to re-insert it”