Add note that not all pickle files apply to any given EXPTYPE

main.py

@@ -180,6 +180,8 @@ EXCLTR = 0, 2*PDT # time range around PDT to treat as transient response
 assert EXCLTR[0] <= PDT <= EXCLTR[1]
 
 # load data from pickles:
+print("NOTE: for a given EXPTYPE, only some pickle files exist and are relevant,\n"
+      "      expect some 'file not found errors':")
 subfolder = EXPTYPE if EXPTYPE != 'pvmvis' else ''
 name2val = load_all(subfolder=subfolder)
 locals().update(name2val)