Cannot Identify ID of the Invalid Extrusion Base Sketch

[Max_Irving-Lamb]

Hi all, 

First time poster.
I have created a sash window family, which is warning when loaded that the 'Base Sketch for extrusion is invalid' - but I am struggling to identify which extrusion is causing the issue. Have tried to select by the ID presented in the error message, but am told the ID is invalid. Am currently trying to manually comb through the IDs, but having little luck.

Please see the family attached.
Do let me know if  you can find the culprit!

Thanks

[Revit_Whisperer · Accepted solution]

The issues are with 1750H and 1750H2

[Max_Irving-Lamb]

Thank you! Have removed those types and all is fixed.

[Revit_Whisperer]

Happy to help!