For which application are you attempting to set a default invoice spec? Adagio OrderEntry or Invoices? And where do you want the default to appear; when printing invoices or creating customers?

In OrderEntry, the default spec for printing is set from the File / Workstation Options function and the Specification tab (this information is saved on the workstation). For creating new customers, the default is in the OE Company Profile, on the Optional/Specs tab.

In Invoices, the default printing spec is the one you most recently used, and this is saved by user if you are running the current version 9.0A. The specs in the IN Company Profile are only used if you choose to print invoices using the 'Customer Specification' and no spec has been defined on the customer record.

We would also need to know the version of the programs you are using, and whether your spec has been defined to be specific document type (ie invoice or credit note). There are no known issues with saving specifications in any of the locations indicated above.