To export messages loaded to a layer/directly, to a file, use the command exchange/export_messages:
svc=exchange/export_messages¶ms={"layerName":<text>, "format":<text>, "itemId":<long>, "timeFrom":<uint>, "timeTo":<uint>, "compress":<bool>}
 Current request can't be executed simultaneously with any request from this chapter and following requests:
| Name | Description | 
|---|---|
| layerName | message layer name (optional), to export from layer | 
| itemId | unit ID (optional),to export directly for time (not from layer) | 
| format | file format: txt, kml, plt, wln, wlb | 
| timeFrom | time from(optional), to export directly | 
| timeTo | time to(optional), to export directly | 
| compress | compress file: 0 - no, 1 - yes | 
Returns a file of specified format.
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