QEXCLUDE and DEXCLUDE BDOC messages in system log

Hi,

Our outbound BDOC queue (in the ERP system) stalled last night, and we found the following two entries in the system log (SM21):

20:47:06 DIA  006 400 SYS_USER                Q2  X QEXCLUDE R3AD_CUSTOME,BDOC_CONNECTOR_400 201659,20150202

20:47:48 DIA  006 400 SYS_USER                Q2  X DEXCLUDE BDOC_CONNECTOR_400 201659,20150202

This one is new to me! Does anybody know what these QEXCLUDE and DEXCLUDE messages mean?

When you drill down, it has this info:

Details
Recording at local and central time........................ 02.02.2015 20:47:06

Task...... Process                    User...... Terminal Session TCode Program  Cl Problem cl          Package

02845     Dialog work process No. 006 SYS_USER   170.18.3       1       SAPMSSY1 T  Transaction Problem SRFC

thanks

Paul