the problem was with the programming style, which is not suitable for 
parallel programming. When I changed Simultaneous runs in parallel to 1, 
the behavior space worked fine. Thank you, Robert, for a recommendation to 
try to debug.

On Monday, August 14, 2017 at 8:58:39 PM UTC+3, Valentas Gruzauskas wrote:
>
> Hi,
>
> I am making a simulation with NetLogo and extension R. I have made a 
> supply chain model, where I have distributors and consumers. Consumers 
> provide orders to distributors and distributors forecast future demand and 
> places orders to suppliers in advance to fulfill market demand. The 
> forecast is implemented with extension R (
> https://ccl.northwestern.edu/netlogo/docs/r.html) by calling elmNN 
> package. The model works fine when simply using "go". 
> However, when I want to conduct experiments by using behavior space, I 
> keep getting errors. If I set only a few ticks with behavior space, the 
> model works fine. But when I want to launch a few hundred ticks behavior 
> space keeps crashing. For example, "Extension exception: Error in 
> R-extension: error in eval, operator is invalid for atomic vector", 
> "Extension exception: Error in R-extension: error in eval: cannot have 
> attributes on CHARSXP". Sometimes the behavior simply crashes without any 
> error.
>
> I assume that the errors are related to computability issues between 
> NetLogo, R, R extension and java. I am using NetLogo 5.3.1, 64-bit; R-3.3.3 
> 64-bit; rJava 0.9-8.
>
> Model example: https://www.youtube.com/watch?v=zjQpPBgj0A8
>

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