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Search by line crossing is possible only when:

1. VMDA metadata storage and the Tracker objects are created for the camera that is used for searching in Intellect Axxon PSIM software package (see Configuring smart video detection tools); and
   
2. VMDA metadata storage is selected for the corresponding camera on the Monitor object settings panel (see Selecting and configuring video cameras).

Setting the traffic direction of the object by VMDA detector depends strongly on Tracker object settings (see Intellect Axxon PSIM software package: Administrator's Guide manual). With bad settings the traffic direction can be determined incorrectly and, consequently, results can be wrong while searching in line crossing archive. The settings of Tracker object should be used experimentally for every case.