so we are doing the IP for block RAM and getting into this error at routing step [WARNING DRT-0087] No valid pattern for unique instance 176, master is sky130_fd_sc_hd__or3b_1. [INFO DRT-0081] Complete 82 unique inst patterns. [ERROR DRT-0085] Valid access pattern combination not found for input35

First, make sure you are operating on the latest version of the software. Second, this error means that the router was not able to make a valid connection to this instance. You may want to inspect the design to see if something looks odd with that instance, such as being placed in a weird location or being placed with too high cell density, etc. If nothing sticks out, you may want to file an issue on the OpenROAD GitHub repo with a reproducible test case.

Ahh okay. Thankyou soo much