Message type: E = Error
Message class: BRAIN_SUP - BRAIN messages (for use by support)
Message number: 015
Message text: You want to replace variable &1[&2] from &3[&4], but &2 is a node var.
Variable &V1&[&V2&] should be replaced by the value of Variable &V3&[
&V4&]. But &V2& is a hierarchie node variable. The replacement is not
Variable &V2& cannot be used.
Check variable &V2&.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.