B20.1: egrep doesn't take {n}

[yzhang@imagenow.com]

According to the manual of egrep, egrep should be able to process expression like I{2}A. But in fact, it
doesn't. I have tried:
egrep I{2}A ocr1.txt
under Windows NT 4.0 with service pack 4, it returns nothing. I have tried egrep under AIX, and it's working fine.

Yong Zhang

(See attached file: ocr1.txt)
Text - character set unknown
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