# Verifier error org/hsql/jdbcConnection.getTypeMap()Ljava/util/Map
This means the class java.util.Map was not found. In JDK 1.1, this class does not exist. When compiled for 1.2, there is a reference this class required to conform the JDBC 2.0 interface. This class itself is never used, but the reference is required anyway. It looks like most verifiers have no problem with this, but some have.
The (only) solution for this problem is to recompile (at least the client part) for JDK 1.1. You will need to install JDK 1.1 before you can do this, then see: