HI pooja,
Goto rz70 or NWA sld data supplie, depending on snap or Java respectively and push data to the sld connected to solma. Now goto lmdb and check for technical system, it should be there. Now create a produc system and run verification test. create a logical component and assign it to a solution. Put this system in solution.
now goto mopz and try to generate the stack
refer
Logical Component Assignment in LMDB of SAP Solution Manager 7.1 SPS10
IF you need any other help, come back again.