Interesting ECPG error

I'm running 7.4.2 and using ECPG's dynamic SQL capabilities to run some pgplsql functions in a database, some of which just insert records into a table. The dynamic SQL statement looks something like this:

"SELECT create_foo(?, ?, ?, ?);"

I'm supplying all 4 arguments, and all 4 arguments have legal values, but ECPG always returns a -220 (too few arguments) in sqlca.sqlcode when running these statements. Other functions that I have are of the form:

"SELECT * from get_foo(?, ?);"

In these cases, with all valid arguments ECPG is returning a 0 (normal return).

Now, I assume that the -220 is due to a "malformed" SELECT statement in the first case, though this seems to work ok in psql. My question is: is there a way to rewrite the failing case above so that it returns a 0 instead of a -220?

Thanks!

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