Yes , this error is being faced by many of taxpayer
Today I did the R&D on it actually it comes due the bill no. entered in table 4a , it does not accept the duplicate bill for eg. If X supplier has issued u bill no. 100 , 105, 106, &. Y supplier issued u a bill no. 105 , 110, 111, then the bill 105 is duplicate bill. the sheet will validate but while generating Jason file it gives a Error Run Time
This is being practically done by me . plz prefix 0 or any alphabet to such duplicate bills, ur return will generate the Jason file
so it's the inefficient software team who design the software in such way
Thanks A lot I was facing this problem. Now JSon created. But I think it's a Fault of system which should be highlighted to authorities. Thanks Once again.