The block 'xyz/If Action Normal/In1' has a discrete sample time that does not match the sample time 0 of the If block 'abc' controlling its execution

0
votes

I've run into the following error message from Simulink:

The block 'xyz/If Action Normal/In1' has a discrete sample time that does not match the sample time 0 of the If block 'abc' controlling its execution

My solver configuration is variable step/auto, and the environment could be seen at the end of this post.

I tried a few methods:

  1. try to locate the error by replacing/comment out blocks;
  2. try to change the port driving if-action block;
  3. try to remove all discrete blocks;

Any suggestion is highly appreciated.

1
matlabsimulink
The message is telling you that the If block and the If Action subsystems that it feeds, must have the same sample times. In your case they currently do not. – Phil Goddard

1 Answers

0
votes

This error is hidden behind a Matlab known bug. Basically, when I tried to add a rate transition to make the same time consistent. The system crashed.

The crash is because of a known Matlab bug. A zero-holder needs to be added following unit delay blocks. After this, I could add rate transit block without model crashing.