bug fi, always need to regenerate the import .pos file

parsers/survex.py

@@ -2142,6 +2142,9 @@ class LoadingSurvex:
         def runcavern():
             """regenerates the .3d file from the .svx if it is older than the svx file, or older than the software,
             or randomly using chaosmonkey() just to keep things ticking over.
+            
+            This completely fails for e.g. troggle_import_root.svx as the survex file merely includes other files, 
+            which may well have changed, e.g. the *fix statements in gps25.svx
             """
             try:
                 print(