No material document could be found for cancellation

Hello

I ahve created Salesorder afterthat delivery , goods issue , billing( invoice )i have done . i want reverse all the Documents . i have cancell the invoice document . after that iam typing to revers the delivery using Trasaction VL09

iam getting error like ......

GI for delivery ********** cannot be canceled for the following reasons:

No material document could be found for cancellation

please help me

@sakhi