..., i am getting the errors i could not find where the error occurs,please help me ...

Sure, here you go Basic debugging checklist , brian's Guide to Solving Any Perl Problem, On debugging, verify everything, talk to teddybear ... checklists and more ..

Before you try to generate $n=20 worth of valid json, try to generate $n=1 worth of valid json

In reply to Re: need help in validating json by Anonymous Monk
in thread need help in validating json by praveenchappa

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