# RT-BOX problem about the ‘’Illegal transition conditions in forced commutation for topology 2‘’

**URL:** <https://forum.plexim.com/t/rt-box-problem-about-the-illegal-transition-conditions-in-forced-commutation-for-topology-2/983>\
**Category:** RT Box\
**Tags:** rt-box, c2000\
**Created:** [March 12, 2021, 11:14am UTC](https://forum.plexim.com/t/rt-box-problem-about-the-illegal-transition-conditions-in-forced-commutation-for-topology-2/983 "2021-03-12T11:14:24Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![shichenseu](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@shichenseu](https://forum.plexim.com/u/shichenseu)\
**Post date:** [March 12, 2021, 11:14am UTC](https://forum.plexim.com/t/rt-box-problem-about-the-illegal-transition-conditions-in-forced-commutation-for-topology-2/983/1 "2021-03-12T11:14:24Z")

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Initializing realtime simulation Setting timer to 50000 Hz Starting simulation. Illegal transition conditions in forced commutation for topology 2

Dear specialsit: is this problem related to my rectifier load?

 ![191](https://europe1.discourse-cdn.com/flex006/uploads/plecs/original/1X/fff10310957a1f95e9258d94026542b95369db82.jpeg)

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**Author:** ![Bryan\_Lieblick](https://dub1.discourse-cdn.com/flex006/user_avatar/forum.plexim.com/bryan_lieblick/32/10_2.png) [@Bryan\_Lieblick](https://forum.plexim.com/u/Bryan_Lieblick)\
**Post date:** [March 15, 2021, 10:21am UTC](https://forum.plexim.com/t/rt-box-problem-about-the-illegal-transition-conditions-in-forced-commutation-for-topology-2/983/2 "2021-03-15T10:21:28Z")

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