We installed:

IBM Informix Dynamic Server Version 10.00.UC6
JDBC – 3.00
J2SE 1.4.2

On operational system Red Hat Enterprise Linux AS release 4 (Nahant) 2.6.9-5.EL

We create a UDR-procedure in java that will return multiple types data in IDS.

We realized java file. We compiled and created the jar.

class test {
  public static int two_return(int i, String s){
    i=5;
    s="OK";
    return 0;
  }
}

Then we installed the jar:

EXECUTE PROCEDURE install_jar ("file:$INFORMIXDIR/extend/krakatoa/Test_j.jar", "Test_j", 0);

Created function for IDS:

CREATE FUNCTION test_return (OUT a integer, OUT s char(5)) returns int external name 'Test_jar:test.two_return (int, java.lang.String)' language java;

ALTER FUNCTION test_return (ADD HANDLESNULLS);

tried call function:

SELECT a, s FROM systable WHERE tabid=1 AND test_return (a#integer, s#char(5))=0;

result of execution select above, error appears:

Error (-937): Cannot find class for type().

LOG:
Installing jar test.informix.Test_j...
ADDING TO JARMAP: test.informix.Test_j + informix.jvp.dbapplet.impl.JVPClassLoader@5797b5ce
   PARAM is not NULL


Questions:
Why appears the error and how to achieve the above-named task?