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nunobrum / PyLTSpice

Set of tools to interact with LTSpice. See README file for more information.
https://www.nunobrum.com/pyltspice.html
GNU General Public License v3.0
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Read measurement results from log file after simulating with simrunner #98

Closed MoritzSeidel-2000 closed 1 year ago

MoritzSeidel-2000 commented 1 year ago

I would like to start a Simulation via SimRunner and get a signal via the .MEAS-Function in my .LOG -file When simulating the LT-Spice files via the "SimRunner", the "Meas-Instructions" are taken over into the newly created netlist, but the result is not displayed in the log file. Instead a "Measurement failed" message is displayed. Also via the "add_instructions" function no result of the "Meas" function can be displayed in the log file.

nunobrum commented 1 year ago

Most likely the measurement is failing because it has a syntax error. Please make sure to test the measurement command directly in LTSpice before adding it through the add_instruction method. Add the .meas instructions with the S key and type .MEAS …….. rest of the meas command……. You can test the .meas instructions in LTSpice by right clicking on them, then use the Test button.

MoritzSeidel-2000 commented 1 year ago

thanks for the quick reply :) The problem unfortunately still exists The "Meas-Command" within LT-Spice works fine as long as LT-Spice is started by hand. As soon as the simulation is started via the "SimRunner" the "Measurement Error" occurs in the log file. Thereby the Meas-Command was correctly taken over into the generated Netlist.

MoritzSeidel-2000 commented 1 year ago

I was able to solve the problem with the "Meas-Instructions". The problem was not with PyLTSpice itself. It was just not possible to measure the drain current directly at the transistor, probably because it is an external model. With a 0V voltage source at the drain connection the current can now be determined without problems :D