Run into "Paused: Press any key"

I'm using Matlab 2020a to do some simulation. The old code has been used for monthly, but starting from last week it always run into an automatic pause showing "Paused: Press any key" on the lower left cornor of the command Window...Sometimes, it paused in a few minutes, and sometimes in about an hour...I do have two lines

pause(1);
pause(0.01);

in the for loop, but it would be run every loop. So I don't know where this pause unexpected come from

Any idea?

Answer 1

[Jan]

This problem appeared in R2016a already: https://www.mathworks.com/matlabcentral/answers/278430-why-does-program-execution-hang-when-using-pause

The workaround have been strange. Do you need pause command in your code? Try to replaces them by drawnow. Do you need Matlab to wait for a certain time? Then try:

java.lang.Thread.sleep(duration*1000)

This has less jitter than pause() also.

[Shinuo Weng]

HI Jan,

Thanks for youre reply. I will try what you recommended. That's a real old bummer...

Last week, there was a suddent problem with the Java enviroment variable. I tried to rest the variable under somewhere I don't remember now(this PC?), but it didn't work. I had to uninstal and reinstal to solve the problem I don't know if it is ever related...Just to share.