What does this calculation error mean and how can I correct this? "Caused by: java.lang.NegativeArraySizeException"

Question

Answer 1

Maybe I am not getting the point with your questions (also the other one: "why does the program [...] take forever...", https://ask.openlca.org/2953/programme-forever-respond-calculations-create-product-system); if you expect to obtain an answer that somehow helps you then you need to explain a bit more, thank you.