is there a way of resetting the atuogenerate expression numbers?
I have deleted pieces of equipment and valves, so now those numbers are available, but when I insert something new, the numbers carry on from the last.
You can edit the last used value and the increment directly in the *_PnIdPart.xml file in your project folder.
You'll find the values stored in he <ProjectAutogen> section, for example:
<AutogenItem key="LastPumpValue" description="Last Pump Number counter" lastUsedValue="90" increment="10" />
<AutogenItem key="LastValveNumber" description="Last Valve Number" lastUsedValue="100" increment="1" />