Issue with JIT C udfs

Hi, I have an issue with C udfs. While most of the examples at https://www.monetdb.org/blog/JIT_C_C%252B%252B_UDFs_in_MonetDB run without problem, the example with SNAPPY does not run. It seems that linking, and includes work but if I call a function from the external library it fails with “write error on stream” The same happens also with other external libraries. My version is v11.37.11. Is there any idea for this issue? Yannis