The NUCLEUS environment variable has not been set. This variable contains information required by the Data Vault Service and client applications. The only non-optional NUCLEUS parameter is the SUPPORT path; this parameter tells the Data Vault Service and client applications where to find the nucleus.ini file. All other parameters can be set either in the NUCLEUS environment variable or the nucleus.ini file. If a parameter appears in neither the NUCLEUS variable or the nucleus.ini file, the default parameter value is used.