has anyone faced this? attempted only 3 labs but its showing 15 lab limit is over for today??????

[Aman7240]

I only attempted 3 labs today and it is showing that i have already completed the limit of 15 labs for today. I have attempted each labs only one time. I saw the same message yesterday as i had attempted 15 labs yesterday. But today only after attempting 3 labs it is showing that lab limits is over.  Is it a glitch? have someone else also faced it? do i have no other option than waiting for tomorrow? what should i do?

[kc3 · Accepted solution]

To decide whether start is allowed, the control mechanism looks at the time of the 15th-last lab, which has to be more than 24 hours ago. So if yesterday you did your 15 labs at 1pm, 2pm, 3pm, ..., then today you can do your first lab after 1pm, the second lab only after 2pm, etc. It is called a rolling horizon (or moving window), always looking at the 15th-last lab, not at the calendar date. 

[hanisntsolo1]

sliding window we call it.