x2sys_solve question

[MarcoNL96]

Hi
I have 9tracks Ti.dat ( longitude|latitude|free air anomaly ) -> lon | lat | faa
I also have a table of weight: weights.txt -> track | weight

export x2sys_home ...
gmt x2sys_init LLA -Dlla -Edat -V -Gd -Ndk -Nsk -Rd -Wd0.8
gmt x2sys_cross -TLLA *.dat -V1> cross.out
gmt x2sys_list -TLLA cross.out -V -Cfaa -Fncw -Wweights.txt > list.out
gmt x2sys_solve -TLLA list.out -V -Cfaa -Ec -W > solve.out

The problem appears in gmtx2sys_solve, because I want to use the column weights of crossovers that I got in x2sys_list with -Fncw -Wweights.txt but x2sys_solve gives the same solution as if they were all weights 1.
I was looking for examples of x2sys_solve using -W but I couldn't find any.
My questions would be:
Why does x2sys_solve ignore the weight column (the last one) of list.out ?
Am I misusing the x2sys_solve command?

Hope someone can help me
Have a great day
tracks.zip

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[PaulWessel]

x2sys issues are tricky to debug since I need to be able to recreate the case. If you are able to, please zip up files, including the LLA file setting so I can recreate. Ideally, you will try to keep the data as simple as possible (maybe remove some tracks) while still showing the problem.

[MarcoNL96]

That's a good idea, I've just edited the post adding the file with the tracks at the end
Thanks