Sine wave generator

[Square101]

Hi, I want to build a sine wave generator as shown on the op_amp circuit collection data sheet here https://www.electro-tech-online.com/custompdfs/2004/05/AN-31-1.pdf. But when I drew the schematic in Orcad capture and tried to simulate it, it showed me an error saying "simulation aborted because of error during netlisting"

The op amps I'm using are LM101A. Where should I connect the Pin 5 and Pin 8 to? For the 6.3 V Zener diodes, what is the corresponding part in Orcad capture?

Are there any other good simulation softwares out there?

Thank you very much!

 

[Sebi]

It used for compensating.

 

[Square101]

Is R3 a variable resistor? BTW, what capture and simulation software you guys use? I tried multisim 7 just recently, i find it so much easier than orcad capture.

thank you