Is working now. Documented how it appears to work here https://therion.speleo.sk/wiki/bds#concepts |-maps (enables or disables output map structure for the selected surveys) |-maps-offset (enables or disables output of defined passage offsets from their true positions) maps if maps OFF is chosen, defined map structures are NOT parsed to the outputs (therefore offsets are disabled and previews of passages are not shown). Only scraps from the selected (or source) surveys are output. Survey centrelines and stations are not output. maps-offset if OFF is chosen, defined offsets are ignored, and the scraps are drawn in their true positions. Previews are exported as usual (although previews associated with any offsets are of course not required). Maps-offset has no meaning or effect if maps off is also chosen. Bruce From: Therion <therion-bounces@speleo.sk> On Behalf Of Stacho Mudrak Sent: Tuesday, 3 December 2019 10:53 To: List for Therion users <therion@speleo.sk> Subject: Re: [Therion] Maps-offset New development version Hi Bruce, obviously there was an error in the code, now it should work as expected. Only selected maps are exported and maps offset can be turned off. Thanks for finding out. S.