Hi all,

I hope someone can help me because I'm running out of ideas.

I have an UDF collection written in C language. It works fine on the Linux server (Firebird version is: firebird-superclassic-2.5.6.27020.0-1.el7.x86_64)

I just simply compiled it with gcc, copied the output .so file to Firebird's UDF folder and it just works.

Now i want to use this UDF on my Windows development laptop as well, so testing would be faster. Firebird installed on my laptop is: 2.5.7.27050, the 64 bit version

I took the same C file, compiled it with MinGW 64 bit compiler, copied the output to Firebird's UDF folder, declared in the database like:

DECLARE EXTERNAL FUNCTION addnumbers

    INTEGER,

    INTEGER

RETURNS INTEGER BY VALUE

ENTRY_POINT 'sum' MODULE_NAME 'sampledll';

Then i run this select:

SELECT addnumbers(5, 7) FROM rdb$database

I get this error msg: 

can't format message 13:896 -- message file C:\Windows\firebird.msg not found.

invalid request BLR at offset 36.

function ADDNUMBERS is not defined.

module name or entrypoint could not be found.

I also restarted Firebird, but still no success.

Do you have ideas why it cannot find my UDFs?

How could i find more detailed information? (Like it doesn't find the file? Or there is a problem finding the function in the file? Or are there compatibility issues? Or anything else?)

Thank you,

Szilveszter