SAP Inst Error

Dears,

while installing SAP 4.7, i m getting below error in SAPInst Log,

MOS-01012 PROBLEM: 'C:\usr\sap\P01\SYS\exe\run/startsap name=P01 nr=00 SAPDIAHOST=p01' returned with '-1' which is not a defined as a success code.

could u please give your answer in details