However, if a function block is executing slowly and has not latched new outputs when it receives the compel data command, the function block publishes the output data generated during the last run of {HEAD ~ the function block} and indicates that the published data is old data by not incrementing {TAIL ~ a sequence number} that is sent with the data 
However , if a function block is executing slowly and has not latched new outputs when it receives the compel data command , the function block publishes the output data generated during the last run of { HEAD ~ the function block } and indicates that the published data is old data by not incrementing { TAIL ~ a sequence number } that is sent with the data
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH