FPEM507 Only one task in this ISPF logical session can be connected to Db2

Explanation

An attempt has been made to start a second DSN or Call Attach Facility (CAF) connection to Db2 from one ISPF logical screen. This error may occur if you attempt to start a second Online Monitor session or start, for example, SPUFI and a second Online Monitor session in one ISPF logical screen.