error -ould not get wave dump or wave dump no longer available.

[Giorgina M.I.]

hello,

I run my code ( I completed the debugging ) but I see this error:

Could not get wave dump or wave dump no longer available. Re-run the EDA Playground to get a fresh wave dump.

The code: https://www.edaplayground.com/x/Ufp8

thank you 

[EDA Playground]

You simulation never stops. This is because the process "stim_proc" loops for ever. (That's what VHDL processes do, because they are intended to model hardware and that's what hardware does.) You need to add a "WAIT;" at the end of the process. "WAIT;" means "wait forever", so your process will only execute once.

Because your simulation never stops, EDA Playground kills it after one minute. Then there is no waveform file to display. Hence the error. There is a task on the ToDo list to make this error easier to understand. But there are a lot of things on the ToDo list.