Unable to Generate Scripts for Publications

Version is SQL 2008 R2 Enterprise

I am attempting to document our replication configuration.

Replication is running and working fine:

In SSMS I right click on a publication and select Generate Scripts.

I receive the error

SQL Server cannot generate the SQL script.

Additional Information:

An exception occurred while executing a Transact-SQL statement or batch.

(Microsoft.SqlServer.ConnectionInfo)

Could not find stored procedure ''. (Microsoft SQL Server. Error: 2812)

The T-SQL statement EXEC sp_helpsubscription 'SubscriptionName'

returns the following:

Msg 2812, Level 16, State 62, Procedure sp_MSrepl_helpsubscription, Line 537

[Batch Start Line 268]

Could not find stored procedure ''.

Any ideas on what I could check?