Crash when Solve for Integral with 15C

[Thomas Okken]

(09-02-2017 08:24 PM)rprosperi Wrote:  

(09-02-2017 08:09 PM)Thomas Okken Wrote:  No, INTEG doesn't change or unset ACC. I was referring to the case in which the ACC variable doesn't exist (hasn't been created, or has been CLV-ed); in that case, INTEG behaves as with ACC=0.

Thanks. Some quick checking reveals the 42S/Free42 create ACC (=0.0) if it doesn't exist when entering Integrate, but thereafter it is retained, like any other Real VAR, unless redefined or CLV-ed.

Correct, but if you call INTEG without using the ∫f(x) menu, e.g.

PGMINT "ECUBE"
0
STO "LLIM"
6
STO "ULIM"
CLV "ACC"
INTEG "X"

ACC is not created. In other words, it is created by the ∫f(x) menu, not by the INTEG function.