Hi Anil,
If I compile the URL by combining call structure parameters, I am able to reach to catalog and check-out just fine. It is only problem when the catalog is launched from Shopping Cart page on portal.
Here is the call structure.
| 10 | http://xxxxx/SRM-MDM/SRM_MDM | URL | |
| 11 | username | test123 | Fixed Value |
| 13 | password | test123 | Fixed Value |
| 15 | server | sapsxsus | Fixed Value |
| 16 | catalog | SD1_MDM_CAT | Fixed Value |
| 19 | uilanguage | EN | Fixed Value |
| 70 | datalanguage | EN | Fixed Value |
| 90 | BYPASS_OUTB_HANDLER | X | Fixed Value |
| 91 | usePortalNavigation | X | Fixed Value |
| 100 | BYPASS_INB_HANDLER | X | Fixed Value |
| 135 | HOOK_URL | Return URL | |
| 200 | returntarget | _parent | Fixed Value |
SG