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The TRANS Procedure

Missing Values

A missing value in a HEADNODE list variable in the COST= data set indicates that the arc from that observation's TAILNODE list source node to the corresponding destination node does not exist. A missing supply or demand value is interpreted as zero.

A missing value in the MINFLOW= data set and CAPACITY= data set causes the procedure to assign the default capacity or default minimum flow to the corresponding arc, if it exists.

A missing value in the OUT= data set is used when the arc does not exist.

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