SAP Knowledge Base Article - Preview

2642989 - JConnect error "JZ0TC: Attempted conversion between an illegal pair of types" after build upgrade - SQL Anywhere


  • JConnect 5.5 started throwing an error on SELECT after SQL Anywhere was upgraded to newer build:
    "Z0TC: Attempted conversion between an illegal pair of types ".
  • Selecting bigint using JConnect stopped working after upgrade



  • SAP SQL Anywhere 16
  • SAP SQL Anywhere 17
  • Jconnect 5.5 (jconn2.jar)


SAP SQL Anywhere 16.0 ; SAP SQL Anywhere 17.0


JConnect SQLA SQL Anywhere jconn2.jar Z0TC , KBA , BC-SYB-SQA , SQL Anywhere (on premise, on demand) , Problem

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