diff --git a/gprMax/input_cmds_multiuse.py b/gprMax/input_cmds_multiuse.py
index 3216e56d..aa611f09 100644
--- a/gprMax/input_cmds_multiuse.py
+++ b/gprMax/input_cmds_multiuse.py
@@ -770,7 +770,7 @@ def process_multicmds(multicmds, G):
             if tmp[0] not in CFSParameter.scalingprofiles.keys() or tmp[4] not in CFSParameter.scalingprofiles.keys() or tmp[8] not in CFSParameter.scalingprofiles.keys():
                 raise CmdInputError("'" + cmdname + ': ' + ' '.join(tmp) + "'" + ' must have scaling type {}'.format(','.join(CFSParameter.scalingprofiles.keys())))
             if tmp[1] not in CFSParameter.scalingdirections or tmp[5] not in CFSParameter.scalingdirections or tmp[9] not in CFSParameter.scalingdirections:
-                raise CmdInputError("'" + cmdname + ': ' + ' '.join(tmp) + "'" + ' must have scaling type {}'.format(','.join(CFSParameter.scalingprofiles.keys())))
+                raise CmdInputError("'" + cmdname + ': ' + ' '.join(tmp) + "'" + ' must have scaling type {}'.format(','.join(CFSParameter.scalingdirections)))
             if float(tmp[2]) < 0 or float(tmp[3]) < 0 or float(tmp[6]) < 0 or float(tmp[7]) < 0 or float(tmp[10]) < 0:
                 raise CmdInputError("'" + cmdname + ': ' + ' '.join(tmp) + "'" + ' minimum and maximum scaling values must be greater than zero')
             if float(tmp[6]) < 1: