Not possible to use the MVAR

[tpersson]

It is written in the documentation that it is possible to define your own variable and then use it to match. However, when I check this was only possible in version of MAD-X before V3 which was around 2006. The macro in MAD-X provides a more powerful matching possibility than the MVAR so I would recommend to remove simply remove it from the documentation.

[1ronmoore1]

Actually, it had been functional in v5.02.13. When I tried v5.03.07 I discovered it was no longer supported.

[tpersson]

You are correct. It worked actually all the way up to 5.03.06 as long as the slow flag was used. In my tests I forgot to use it and then we really have to go back long time before it works.

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________________________________ From: 1ronmoore1 [notifications@github.com] Sent: 28 February 2018 22:55 To: MethodicalAcceleratorDesign/MAD-X Cc: Tobias Hakan Bjorn Persson; Assign Subject: Re: [MethodicalAcceleratorDesign/MAD-X] Not possible to use the MVAR (#543) Actually, it had been functional in v5.02.13. When I tried v5.03.07 I discovered it was no longer supported. — You are receiving this because you were assigned. Reply to this email directly, view it on GitHub<#543 (comment)>, or mute the thread<https://github.com/notifications/unsubscribe-auth/AFBJZpM3UpQ8QVe2cp5FZvh2cXKMZRptks5tZctagaJpZM4RqWQj>.

[coldfix]

Hi, this may be due to my patch then. Can you give a minimal example?

[1ronmoore1]

I do not have a minimal example handy, and I won't have time to create one until next week.

For what it's worth, in 5.03.07 I see:

+=+=+= fatal: +-+-+- fatal error
match - collect: illegal name
- try with the "slow" option
- name = mvar3

whenever I use a constraint with a user variable. I am using the SLOW flag in my match command. Despite the fatal error message, the match fit continues, and I now realize that I do get the same numerical results in 5.02.13 and 5.03.07.

[tpersson]

That is interesting because in my example I really do get the MAD-X exits and I don't get any matching. I have found the commit that breaks it but there has been many changes around there since then so it is not just to revert that commit. I will try to find a solution for this. cheers Tobias

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________________________________ From: 1ronmoore1 [notifications@github.com] Sent: 01 March 2018 14:45 To: MethodicalAcceleratorDesign/MAD-X Cc: Tobias Hakan Bjorn Persson; Assign Subject: Re: [MethodicalAcceleratorDesign/MAD-X] Not possible to use the MVAR (#543) I do not have a minimal example handy, and I won't have time to create one until next week. For what it's worth, in 5.03.07 I see: +=+=+= fatal: +-+-+- fatal error match - collect: illegal name - try with the "slow" option - name = mvar3 whenever I use a constraint with a user variable. I am using the SLOW flag in my match command. Despite the fatal error message, the match fit continues, and I now realize that I do get the same numerical results in 5.02.13 and 5.03.07. — You are receiving this because you were assigned. Reply to this email directly, view it on GitHub<#543 (comment)>, or mute the thread<https://github.com/notifications/unsubscribe-auth/AFBJZlaERyJb-7po3Y0P86zKXpF0TctXks5tZ_tmgaJpZM4RqWQj>.