When i save a new symbol starting from an old symbol (e.g. Save As.. and then change the file name) and select a pin from the Pins table a new tab is automatically opened.
This is the correct symbol with path in the window's title after the "Save as" action
This is the new automatically opened tab with the same symbol and without the file path in the window's title after the selection of a pin.
This is the error message if i try to save this new symbol instead the one i saved early
Sometimes is difficult to realize that this new tab is opened and the result is the lost of the work
This appears to be a bug, but it is not happening in the next version of PADS (VX.2.2) due later this year. As a workaround I would suggest closing the editor after renaming the symbol and then opening the new symbol for edit in a new instance of the symbol editor.