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Syntax error on .MEAS in 24.1.x

Tony Casey All Messages By This Member #160522 开云体育 A new error seems to have crept into .MEAS directives on the 24.1 branch. Measurement names are apparently not now allowed to have a sign character in them, e.g.: .MEAS Tpd+ param T1-T0 .MEAS Tpd- param T11-T10 .. results in: I:\tony\Documents\Simulations\LTspice\Comparator\UniversalComp\Dev\UniversalComp_Test.net(37): syntax error .MEAS Tpd+ param T1-T0 ???????? ^^^^^^^^^^^^^ I:\tony\Documents\Simulations\LTspice\Comparator\UniversalComp\Dev\UniversalComp_Test.net(38): syntax error .MEAS Tpd- param T11-T10 ???????? ^^^^^^^^^^^^^^^ This has worked in all previous versions. In the logfile, normally it would show, e.g.: tpd+: t1-t0=1.08114e-08 tpd-: t11-t10=1.09962e-08 -- Regards, Tony
Mathias Born All Messages By This Member #160523 This is an intentional change that removes an ambiguity. Each measurement name can be used in other .meas expressions. Suppose you have two measurement names "A" and "A+A". What would be the meaning of the expression "A+A"? In short, math operators are not allowed in parameter names. ? Best Regards, Mathias ? On Tue, May 20, 2025 at 05:55 PM, Tony Casey wrote: toggle quoted message Show quoted text A new error seems to have crept into .MEAS directives on the 24.1 branch. Measurement names are apparently not now allowed to have a sign character in them, e.g.: .MEAS Tpd+ param T1-T0 .MEAS Tpd- param T11-T10 .. results in: I:\tony\Documents\Simulations\LTspice\Comparator\UniversalComp\Dev\UniversalComp_Test.net(37): syntax error .MEAS Tpd+ param T1-T0 ???????? ^^^^^^^^^^^^^ I:\tony\Documents\Simulations\LTspice\Comparator\UniversalComp\Dev\UniversalComp_Test.net(38): syntax error .MEAS Tpd- param T11-T10 ???????? ^^^^^^^^^^^^^^^ This has worked in all previous versions. In the logfile, normally it would show, e.g.: tpd+: t1-t0=1.08114e-08 tpd-: t11-t10=1.09962e-08 -- Regards, Tony
Tony Casey All Messages By This Member #160524 开云体育 OK, I get that it's a potential issue, although it has never arisen for me. Perhaps changes like this can be mentioned in the LTspice Change Log, with a note advising of potential backward compatibility problems? This is a sensitive issue, as it can break production systems. I understand the motivation for cleaning up the code, but it comes with risks. -- Regards, Tony On 20/05/2025 18:17, Mathias Born via groups.io wrote: toggle quoted message Show quoted text This is an intentional change that removes an ambiguity. Each measurement name can be used in other .meas expressions. Suppose you have two measurement names "A" and "A+A". What would be the meaning of the expression "A+A"? In short, math operators are not allowed in parameter names. ? Best Regards, Mathias ? On Tue, May 20, 2025 at 05:55 PM, Tony Casey wrote: A new error seems to have crept into .MEAS directives on the 24.1 branch. Measurement names are apparently not now allowed to have a sign character in them, e.g.: .MEAS Tpd+ param T1-T0 .MEAS Tpd- param T11-T10 .. results in: I:\tony\Documents\Simulations\LTspice\Comparator\UniversalComp\Dev\UniversalComp_Test.net(37): syntax error .MEAS Tpd+ param T1-T0 ???????? ^^^^^^^^^^^^^ I:\tony\Documents\Simulations\LTspice\Comparator\UniversalComp\Dev\UniversalComp_Test.net(38): syntax error .MEAS Tpd- param T11-T10 ???????? ^^^^^^^^^^^^^^^ This has worked in all previous versions. In the logfile, normally it would show, e.g.: tpd+: t1-t0=1.08114e-08 tpd-: t11-t10=1.09962e-08 -- Regards, Tony
Richard Andrews All Messages By This Member #160525 As a c programmer and LTspice user, I would never label my variables "A+A". Just saying. toggle quoted message Show quoted text On Tue, May 20, 2025 at 12:59 PM, Tony Casey via groups.io <antoniustrevorum@...> wrote: OK, I get that it's a potential issue, although it has never arisen for me. Perhaps changes like this can be mentioned in the LTspice Change Log, with a note advising of potential backward compatibility problems? This is a sensitive issue, as it can break production systems. I understand the motivation for cleaning up the code, but it comes with risks. -- Regards, Tony On 20/05/2025 18:17, Mathias Born via groups.io wrote: This is an intentional change that removes an ambiguity. Each measurement name can be used in other .meas expressions. Suppose you have two measurement names "A" and "A+A". What would be the meaning of the expression "A+A"? In short, math operators are not allowed in parameter names. ? Best Regards, Mathias ? On Tue, May 20, 2025 at 05:55 PM, Tony Casey wrote: A new error seems to have crept into .MEAS directives on the 24.1 branch. Measurement names are apparently not now allowed to have a sign character in them, e.g.: .MEAS Tpd+ param T1-T0 .MEAS Tpd- param T11-T10 .. results in: I:\tony\Documents\Simulations\LTspice\Comparator\UniversalComp\Dev\UniversalComp_Test.net(37): syntax error .MEAS Tpd+ param T1-T0 ???????? ^^^^^^^^^^^^^ I:\tony\Documents\Simulations\LTspice\Comparator\UniversalComp\Dev\UniversalComp_Test.net(38): syntax error .MEAS Tpd- param T11-T10 ???????? ^^^^^^^^^^^^^^^ This has worked in all previous versions. In the logfile, normally it would show, e.g.: tpd+: t1-t0=1.08114e-08 tpd-: t11-t10=1.09962e-08 -- Regards, Tony
Andy I All Messages By This Member #160539 On Tue, May 20, 2025 at 01:02 PM, Richard Andrews wrote: As a c programmer and LTspice user, I would never label my variables "A+A". Just saying. But might you use a parameter name of "Tpd+"? ? Andy ?

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