Category: Software
Product Number: LTSpice
Software Version: 17.1.8
I recently installed LTSpice 17.1.8 and tried to simulate a circuit that worked fine with LTSpice 17.0.36.0, but it stalls out at ~165ms and never completes. I did a compare of the Control Panel parameters and do not notice any differences. I'm not sure why the new version does not work with my circuit. I have attached the schematic file and the log file. I tried on 2 different W10 machines with the same result.
Of note, he default parts library must have changes, because D1 (BAS40HM) is no longer in the library. I used BAS40HY and also added BAS40HM, but nether changes made a diffrence.
Circuit: * S:\ENGINEERING\Technical Data\Electronics & Software\french\My Stuff\LTspice circuits\LTC7804_24Vsupply20230410.asc Warning: Multiple definitions of model "mysw" Type: Switch C1: both pins shorted together -- ignoring. L6: both pins shorted together -- ignoring. C18: both pins shorted together -- ignoring. C19: both pins shorted together -- ignoring. C12: Increased Cpar to 1e-010 WARNING: Node N012 is floating. WARNING: Node N005 is floating. Direct Newton iteration failed to find .op point. (Use ".option noopiter" to skip.) Starting Gmin stepping Gmin = 10 Gmin = 1.07374 Gmin = 0.115292 Gmin = 0.0123794 Gmin = 0.00132923 Gmin = 0.000142725 vernier = 0.5 Gmin = 2.39452e-005 vernier = 0.25 vernier = 0.125 vernier = 0.0625 vernier = 0.03125 vernier = 0.015625 vernier = 0.0078125 vernier = 0.00390625 vernier = 0.00195313 vernier = 0.000976563 vernier = 0.000488281 Gmin = 2.39452e-005 Gmin = 0 Gmin stepping failed Starting source stepping with srcstepmethod=0 Source Step = 3.0303% Source Step = 6.82706% Source Step = 6.85665% Source Step = 6.88625% Source Step = 6.91584% Source Step = 6.94543% vernier = 0.00146484 Source Step = 6.97798% Source Step = 7.02237% Source Step = 7.06676% Source Step = 7.11115% Source Step = 7.15554% vernier = 0.00219727 Source Step = 7.20215% Source Step = 7.26873% Source Step = 7.33532% Source Step = 7.4019% Source Step = 7.46848% Source Step = 7.53507% vernier = 0.0032959 Source Step = 7.60498% Source Step = 7.70486% Source Step = 7.80473% Source Step = 7.90461% Source Step = 8.00448% Source Step = 8.10436% vernier = 0.00494385 Source Step = 8.25417% Source Step = 8.40399% Source Step = 8.5538% Source Step = 8.70361% Source Step = 8.85343% vernier = 0.00741577 Source Step = 9.07066% Source Step = 9.29538% Source Step = 9.5201% Source Step = 9.74482% Source Step = 9.96954% vernier = 0.0111237 Source Step = 10.2841% Source Step = 10.6212% Source Step = 10.9583% Source Step = 11.2954% Source Step = 11.6325% vernier = 0.0166855 Source Step = 12.0875% Source Step = 12.5931% Source Step = 13.0988% Source Step = 13.6044% Source Step = 14.11% vernier = 0.0250282 Source Step = 14.7673% Source Step = 15.5257% Source Step = 16.2842% Source Step = 17.0426% Source Step = 17.801% vernier = 0.0375423 Source Step = 18.7491% Source Step = 19.8867% Source Step = 21.0244% Source Step = 22.162% Source Step = 23.2997% vernier = 0.0563135 Source Step = 24.6648% Source Step = 26.3713% Source Step = 28.0778% Source Step = 29.7843% Source Step = 31.4907% vernier = 0.0844703 Source Step = 33.4532% Source Step = 36.0129% Source Step = 38.5726% Source Step = 41.1323% Source Step = 43.692% vernier = 0.126705 Source Step = 46.5077% Source Step = 50.3472% Source Step = 54.1868% Source Step = 58.0263% Source Step = 61.8659% vernier = 0.190058 Source Step = 65.8974% Source Step = 71.6568% Starting source stepping with srcstepmethod=1 Could not converge to DC with sources off! Pseudo Transient failed in finding the operating point at 0 s. Trouble finding operating point....skipping operating point for Transient analysis. Ignoring empty pin current: Ix(u1:3) Ignoring empty pin current: Ix(u1:8) Ignoring empty pin current: Ix(u1:9) Ignoring empty pin current: Ix(u1:10) Ignoring empty pin current: Ix(u1:11) Ignoring empty pin current: Ix(u1:12) Ignoring empty pin current: Ix(u1:13) Ignoring empty pin current: Ix(u1:14) Ignoring empty pin current: Ix(u1:15) Ignoring empty pin current: Ix(u1:16) Ignoring empty pin current: Ix(u1:17) Ignoring empty pin current: Ix(u1:18) Ignoring empty pin current: Ix(u1:21) Ignoring empty pin current: Ix(u1:27) Ignoring empty pin current: Ix(u1:28) Changing Tseed to 9.76563e-011 to 1.95313e-010 Heightened Def Con from 0.000282691 to 0.000282695 Heightened Def Con from 0.000292388 to 0.000292389 Heightened Def Con from 0.000353001 to 0.000353005 Heightened Def Con from 0.000403906 to 0.000403906 Heightened Def Con from 0.000452347 to 0.000452351 Heightened Def Con from 0.000687496 to 0.0006875 Heightened Def Con from 0.000728729 to 0.000728733 Heightened Def Con from 0.000784467 to 0.000784471 Heightened Def Con from 0.000786883 to 0.000786883 Heightened Def Con from 0.000837799 to 0.000837803 Heightened Def Con from 0.000849929 to 0.000849933 Heightened Def Con from 0.000886252 to 0.000886256 Heightened Def Con from 0.000929881 to 0.000929885 Date: Fri Apr 28 10:07:52 2023 Total elapsed time: 37.924 seconds. tnom = 27 temp = 27 method = Gear totiter = 1481448 traniter = 1447790 tranpoints = 429766 accept = 343511 rejected = 86478 matrix size = 140 fillins = 35 solver = Normal Thread vector: 16.5/11.5[6] 6.0/7.5[1] 2.1/3.4[1] 0.3/3.0[1] 2592/500 Matrix Compiler1: 5.39 KB object code size 2.2/1.2/[0.6] Matrix Compiler2: 8.62 KB object code size 1.3/2.7/[0.7]
