# \#derivative-infinite

**URL:** https://forum.plexim.com/tag/derivative-infinite/442.md

[Latest](https://forum.plexim.com/latest.md) · [Categories](https://forum.plexim.com/categories.md) · [Tags](https://forum.plexim.com/tags.md)

---

## [I got error :”Derivative is infinite or NaN” when i use 'Fixed step'. What should I do?](https://forum.plexim.com/t/i-got-error-derivative-is-infinite-or-nan-when-i-use-fixed-step-what-should-i-do/1799)

<div class="topic-metadata">

**Author:** [@lovesutdy](https://forum.plexim.com/u/lovesutdy)\
**Replies:** 5\
**Last updated:** [February 19, 2025, 2:53pm UTC](https://forum.plexim.com/t/i-got-error-derivative-is-infinite-or-nan-when-i-use-fixed-step-what-should-i-do/1799 "2025-02-19T14:53:20Z")

</div>

bat.plecs (178.9 KB)

---

## [How to resolve this error: Derivate is infinite or NaN](https://forum.plexim.com/t/how-to-resolve-this-error-derivate-is-infinite-or-nan/734)

<div class="topic-metadata">

**Author:** [@snehathakur](https://forum.plexim.com/u/snehathakur)\
**Replies:** 3\
**Last updated:** [July 13, 2020, 11:17pm UTC](https://forum.plexim.com/t/how-to-resolve-this-error-derivate-is-infinite-or-nan/734 "2020-07-13T23:17:31Z")

</div>

Hi While running my simulation I get the following error at about 0.1 simulation time. This started occurring when i changed the PI parameters for a voltage controller for inverter which is connected in parallel to PV …

---

## [Problem with scripting discrete estimator](https://forum.plexim.com/t/problem-with-scripting-discrete-estimator/775)

<div class="topic-metadata">

**Author:** [@Nardi](https://forum.plexim.com/u/Nardi)\
**Replies:** 2\
**Last updated:** [May 14, 2020, 1:59pm UTC](https://forum.plexim.com/t/problem-with-scripting-discrete-estimator/775 "2020-05-14T13:59:54Z")

</div>

Greeting to all Plecs users, I’m an electrical engineering student and I’m new to PLECS simulations. I have some trouble with implementing some discrete equations in a C-script. I have a set of continuous equations: …