How can I avoid errors using a complex snippet when I need to re-run the snippet because I want to change an initial variable?

[George_Marinos]

This is the Guidlines - How do incorporate your suggestion above to make it workable?

Thanks in advance

George

Copy of Snippet "Blood Thinners Guidelines"

Blood-Thinning Guidelines {note: trim=right} {anti_platelet_drug=["Low-dose aspirin", "Clopidogrel (Plavix or Iscover)", "Low-dose aspirin + Clopidogrel (Co-Plavix)", "Dipyridamole (Persantin or Asasantin)"]; trim=yes} {anti_coagulant_drug=["Warfarin", "Eliquis (Apixaban)", "Xarelto (Rivaroxaban)", "Pradaxa (Dabigatran)"]; trim=yes} {allmeds=merge(anti_platelet_drug, anti_coagulant_drug); trim=yes} {endnote: trim=yes} Do you take ANY Blood-Thinning Medication? {formmenu: name=medstaken; \…