# \#fixed-step

**URL:** https://forum.plexim.com/tag/fixed-step/443.md

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## [Non-sampled zero crossings error in Normal mode but not Codegen mode (fixed-step)](https://forum.plexim.com/t/non-sampled-zero-crossings-error-in-normal-mode-but-not-codegen-mode-fixed-step/3179)

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**Author:** [@Yechan](https://forum.plexim.com/u/Yechan)\
**Replies:** 1\
**Last updated:** [June 23, 2026, 2:27pm UTC](https://forum.plexim.com/t/non-sampled-zero-crossings-error-in-normal-mode-but-not-codegen-mode-fixed-step/3179 "2026-06-23T14:27:11Z")

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Hi, I’m building a fixed-step model of a Shipboard system in PLECS Standalone. The model contains several switching power converters and therefore a large number of ideal switches - a mix of diodes and actively gated …

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## [What is 'Variable-step discrete task'?](https://forum.plexim.com/t/what-is-variable-step-discrete-task/735)

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**Author:** [@JonZ](https://forum.plexim.com/u/JonZ)\
**Replies:** 1\
**Last updated:** [January 22, 2020, 3:23pm UTC](https://forum.plexim.com/t/what-is-variable-step-discrete-task/735 "2020-01-22T15:23:01Z")

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I am playing with fixed step solver and trying to convert a variable-step simulation model into a fixed-step one. But I get error message saying ‘variable-step discrete task are not supported with a fixed-step solver’ w…