rdisp/vb_dequeue_after_commit_error is a SAP Parameter attribute which is used to control information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
If an error occurs during the update and it is defined that the SAP
locks that belong to the update request are to be held, then this can be
overwritten with this parameter.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.