SPI-Problem send multiple bytes

[Sterngleiter]

Can you recommend me a pic simulation software that runs stable ?

[Ttelmah]

None.

Simulators can be slightly useful, for basic things like checking the timing of a small code section, but none are even remotely good enough to be of much use. The MPLAB simulator on the older MPLAB (rather than MPLAB-X), was quite reasonably good, but unfortunately only supports a limited range of processors, getting more and more out of date. The MPLAB-X simulator is far less good.
A chip is the only real test environment.

[temtronic]

I agree with Mr. T. Having 'played with PICs for 3 decades, I've yet to find a simulator that even remotely performs satisfactorly. I've always tested in the 'Real World' using DIP packaged PICs. NO simulator can inject RF, EMI, loose wires, mis-wires, etc. I also prefer the 'man-sized' parts easier to handle, using pre-made modules for peripherals like RTC, USB and wireless.
When I got into microcomputers, it was hand assembly of machine code, so you did a LOT of mental testing BEFORE burning a chip. Erasing took 15 minutes under a strong UV light. Today's chips allow you to cut code/compile/burn/test dozens of versions in that time.

Jay