TechDraw contents destroyed when using FreeCAD 0.19 to open the file created by FreeCAD 0.18.

[Dunndeejones]

TechDraw contents destoryed when using FreeCAD 0.19 to open the file created by FreeCAD 0.18.
However, you can quit without saving file to keep your 0.18 version in good condition.

[freedman]

Your probably getting a recompute and a topological renaming error, this can mess up drawings. If you really need to upgrade the model there are ways, you will need to modify your Sketches and connect them to standard planes. There is also a macro that lets you remap one sketch at a time. You will loose parametrics but you will have a very stable model and drawings.

[chrisb]

I second freedman's guess. To know more we need a preferably simple file showing the issue.

[Dunndeejones]

Your probably getting a recompute and a topological renaming error, this can mess up drawings. If you really need to upgrade the model there are ways, you will need to modify your Sketches and connect them to standard planes. There is also a macro that lets you remap one sketch at a time. You will loose parametrics but you will have a very stable model and drawings.

I did nothing to the file. I just open it and find the contents destroyed. I need to delete the TechDraw page and rebuild it from sketch.