event time changed to present

I got a message on system console that refers to the time that some events occur:

createvent: event in past time is: event time changed to present. Object: TRA advancetime 155_00: -0.102754, clock: 298.675670

...apparently does not affect the performance of the model

I'd appreciate if any could give some tip.

regards,

A friend helped me find the problem and apparently occurs only if there is a negative value in the size of the flowitems (the flow axis). By mistake was setting a negative x-size which caused this message every time the item came to an object.

I hope this helps.

Hi,

I think the most probable explanation is that a random distribution generates a negative value for cycle time, MTBF, MTTR, inter-arrival, etc.

Yeah you're right, we also consider that possibility, but particularly the problem was given like a described at the above post.

Originally Posted by Vincent Bechard

Hi,

I think the most probable explanation is that a random distribution generates a negative value for cycle time, MTBF, MTTR, inter-arrival, etc.

How do I solve this problem then.. Its kind of peculiar. If I stop my model run at about 7307 items this error does not cause a problem. But if I run it for double the items it does not let me run till there.. I am inter-arrival time distributions according to time of day..

put a maxof() function around it so maxof(0 , yourfunction) so your value is never negative

Same problem here with the source indicated as the taskexecuter.
Not sure what the problem is.

Getting multiple "event time changed to present" warnings.
How do I get rid of those?
Model attached.

Hello Vadim,

your distributional function has in the interarrival time negative values, too.
use the method Steven has shown.

maxof(0, normal(20,10,2));// If the normal-function returns a negative value the maximum of 0 and the negative value is 0.

Jörg