# \#logica

**URL:** https://forum.plexim.com/tag/logica/580.md

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## [SR Flip Flop Error - Input signal 2 has not been initialized](https://forum.plexim.com/t/sr-flip-flop-error-input-signal-2-has-not-been-initialized/1088)

<div class="topic-metadata">

**Author:** [@Andrew](https://forum.plexim.com/u/Andrew)\
**Replies:** 2\
**Last updated:** [February 10, 2022, 4:29pm UTC](https://forum.plexim.com/t/sr-flip-flop-error-input-signal-2-has-not-been-initialized/1088 "2022-02-10T16:29:09Z")

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Hello, I’m trying to simulate a dc/dc converter + a control part for it, but I encounter an error on the SR Flip Flop block: Input signal 2 has not been initialized. Can anyone suggest to me how I can solve this proble…