# \#model
**URL:** https://forum.plexim.com/tag/model/2.md
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## [Issue on the SCR model](https://forum.plexim.com/t/issue-on-the-scr-model/1288)
**Author:** [@Ernesto\_Incerti](https://forum.plexim.com/u/Ernesto_Incerti)\
**Replies:** 1\
**Last updated:** [November 21, 2023, 4:44pm UTC](https://forum.plexim.com/t/issue-on-the-scr-model/1288 "2023-11-21T16:44:31Z")
I’ve found a following issue on the SCR model applaing a dc source on a resitive load via an SCR, if i turn on the SCR and after i turn it of, after that i apply a resistive load even if the scr is off a current flow f…
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## [Thermal Package Description :Error evaluating parameter 'Thermal description'](https://forum.plexim.com/t/thermal-package-description-error-evaluating-parameter-thermal-description/1245)
**Author:** [@mr\_naidu](https://forum.plexim.com/u/mr_naidu)\
**Replies:** 4\
**Last updated:** [June 15, 2023, 12:34am UTC](https://forum.plexim.com/t/thermal-package-description-error-evaluating-parameter-thermal-description/1245 "2023-06-15T00:34:28Z")
Hii, I am trying to model the half bridge power module using discrete IGBT and Diode. While implementing thermal package impedance , i am getting the error in thermal description evaluation. I have attached the error an…
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## [Error in Is model of solar cell](https://forum.plexim.com/t/error-in-is-model-of-solar-cell/1207)
**Author:** [@Awesome](https://forum.plexim.com/u/Awesome)\
**Replies:** 1\
**Last updated:** [February 15, 2023, 3:24pm UTC](https://forum.plexim.com/t/error-in-is-model-of-solar-cell/1207 "2023-02-15T15:24:28Z")
I am following a course on udemy and it deals with PV model. This course tutorial was done on matlab but I replicated the modelling on plecs by following each video step. In the Is sub system of the video, Taref and Tact…