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SingleProc processing time error

Valued Contributor
Valued Contributor

Dear community members,


I'm getting the following error for SingleProc: "A time specified has become negative".

It happens only when I use this forumla as processing time:

z_LAPLACE(?.randomSeed,1.4, 0.79)*60

That is a Laplace distribution with mean 1.4 and std dev. of 0.79.

What does this problem mean and how can I solve it?


Thank you



Re: SingleProc processing time error

Gears Esteemed Contributor Gears Esteemed Contributor
Gears Esteemed Contributor

it is an advice, that the value of the distribution function could be negative (would cause an error for procTime), you should set a lower and upper bound for the distribution e.g.


z_LAPLACE(?.randomSeed,1.4, 0.79,0.01,100)*60

Steffen Bangsow
freelance simulation specialist