- allow the old projects to be loaded without crashing the app, although the load is incomplete

CHANGELOG.md

@@ -14,6 +14,7 @@ CHANGELOG for FlatCAM beta
 - small fix in the Toolchange_Manual preprocessor
 - Drilling Plugin - added in the UI the toolchange X,Y parameter and made it to work as expected
 - Milling Plugin - added in the UI the toolchange X,Y parameter and made it to work as expected
+- allow the old projects to be loaded without crashing the app, although the load is incomplete
 
 13.03.2021
 

appObjects/FlatCAMCNCJob.py

@@ -297,6 +297,9 @@ class CNCJobObject(FlatCAMObj, CNCjob):
         self.ui.cnc_tools_table.setMaximumHeight(self.ui.cnc_tools_table.getHeight())
 
     def build_excellon_cnc_tools(self):
+        # for the case that self.tools is empty: old projects
+        if not self.tools:
+            return
 
         n = len(self.tools)
         self.ui.exc_cnc_tools_table.setRowCount(n)
@@ -925,6 +928,8 @@ class CNCJobObject(FlatCAMObj, CNCjob):
 
         # if this dict is not empty then the object is an Excellon object
         if self.options['type'].lower() == 'excellon':
+            # for the case that self.tools is empty: old projects
+            try:
                 first_key = next(iter(self.tools))
                 try:
                     include_header = self.app.preprocessors[
@@ -935,6 +940,9 @@ class CNCJobObject(FlatCAMObj, CNCjob):
                     include_header = self.app.preprocessors[
                         self.tools[first_key]['data']['ppname_e']
                     ].include_header
+            except TypeError:
+                # when self.tools is empty - old projects
+                include_header = self.app.preprocessors['default'].include_header
 
         gcode = ''
         if include_header is False:
@@ -965,6 +973,8 @@ class CNCJobObject(FlatCAMObj, CNCjob):
 
             # detect if using multi-tool and make the Gcode summation correctly for each case
             if self.multitool is True:
+                # for the case that self.tools is empty: old projects
+                try:
                     if self.options['type'].lower() == 'excellon':
                         for tooluid_key in self.tools:
                             for key, value in self.tools[tooluid_key].items():
@@ -977,6 +987,8 @@ class CNCJobObject(FlatCAMObj, CNCjob):
                                 if key == 'gcode' and value:
                                     gcode += value
                                     break
+                except TypeError:
+                    pass
             else:
                 gcode += self.gcode
 
@@ -984,6 +996,8 @@ class CNCJobObject(FlatCAMObj, CNCjob):
 
             # detect if using a HPGL preprocessor
             hpgl = False
+            # for the case that self.tools is empty: old projects
+            try:
                 if self.options['type'].lower() == 'geometry':
                     for key in self.cnc_tools:
                         if 'tools_mill_ppname_g' in self.cnc_tools[key]['data']:
@@ -996,6 +1010,8 @@ class CNCJobObject(FlatCAMObj, CNCjob):
                             if 'hpgl' in self.tools[key]['data']['ppname_e']:
                                 hpgl = True
                                 break
+            except TypeError:
+                hpgl = False
 
             if hpgl:
                 processed_body_gcode = ''