[GNC] Counter formats not saving

[Ron Stone]

I am using Gnucash 3.4 on OSX 10.14.2.

I am creating a new book and trying to set up the invoice counter to use I-%05li as the format. 

If I click Apply and switch to another tab and back, the new format appears as it should in the Invoice Number Format text field.

But if I click OK, the field is cleared. Saving the file after clicking OK makes no difference. The format string disappears. 

None of the other formats (vendor, bill, order, employee etc) save either.

Any suggestions on how to get this working are greatly appreciated.

Thanks,
Ron