Corrected bug with replacing #tx_steps and #rx_steps commands in 3D models.

tools/inputfile_old2new.py

@@ -157,18 +157,24 @@ while(lindex < len(inputlines)):
             if model2D:
                 # Syntax of old command: #tx_steps: dx dy
                 replacement = '#src_steps: {} {} {}'.format(params[0], params[1], 0)
-                print("Command '{}', replaced with '{}'".format(inputlines[lindex], replacement))
-                inputlines.pop(lindex)
-                inputlines.insert(lindex, replacement)
+            else
+                # Syntax of old command: #tx_steps: dx dy dz
+                replacement = '#src_steps: {} {} {}'.format(params[0], params[1], params[2])
+            print("Command '{}', replaced with '{}'".format(inputlines[lindex], replacement))
+            inputlines.pop(lindex)
+            inputlines.insert(lindex, replacement)
             lindex += 1
 
         elif cmdname == '#rx_steps':
             if model2D:
                 # Syntax of old command: #rx_steps: dx dy
                 replacement = '#rx_steps: {} {} {}'.format(params[0], params[1], 0)
-                print("Command '{}', replaced with '{}'".format(inputlines[lindex], replacement))
-                inputlines.pop(lindex)
-                inputlines.insert(lindex, replacement)
+            else
+                # Syntax of old command: #rx_steps: dx dy dz
+                replacement = '#rx_steps: {} {} {}'.format(params[0], params[1], params[2])
+            print("Command '{}', replaced with '{}'".format(inputlines[lindex], replacement))
+            inputlines.pop(lindex)
+            inputlines.insert(lindex, replacement)
             lindex += 1
 
         elif cmdname == '#medium':