When an SDSRM terminates while it is interested in a UR whose state is indoubt, certain control structures must be destroyed. These control structures are rebuilt before the RMs needs them. However, the control structures are rebuilt when each RM interested in the indoubt UR restarts. Thus, the indoubt UR is not allowed to progress until all the RMs interested in the indoubt UR have restarted.

If an SDSRM fails and restarts, and you then notice that a UR is not progressing and the SDSRM is interested in the UR, then use the RRS panels to investigate the UR. If the RRS panels indicate that the UR's state is indoubt, the type is PROT, and the comments are DX, then restarting all the RMs interested in the indoubt UR may allow the UR to progress.