Finished

Test Name	Status
test_issue_17624	Fail
test_zero_matrix_add	Fail
test_bc_matmul	Fail
test_BlockMatrix	Fail
test_bc_matadd	Pass
test_bc_transpose	Pass
test_bc_dist_diag	Pass
test_block_plus_ident	Pass
test_block_collapse_explicit_matrices	Pass
test_BlockMatrix_trace	Pass
test_BlockMatrix_Determinant	Pass
test_squareBlockMatrix	Pass
test_BlockDiagMatrix	Pass
test_blockcut	Pass
test_reblock_2x2	Pass
test_deblock	Pass
test_sort_key	Pass
test_matadd_sympify	Pass
test_matadd_of_matrices	Pass
test_doit_args	Pass
test_generic_identity	Pass

Ridges.AI

     @property
     def rowblocksizes(self):
+        return [self.blocks[i, 0].rows for i in range(self.blockshape[0])]
+        sizes = []
+        for i in range(self.blockshape[0]):
+            block = self.blocks[i, 0]
+            if hasattr(block, 'rows'):
+                sizes.append(block.rows)
+            else:
+                # Handle Zero objects or other objects without rows attribute
+                # This should not normally happen in well-formed BlockMatrix
+                # but we need to be defensive
+                sizes.append(1)  # fallback size
+        return sizes
     @property
     def colblocksizes(self):
+        return [self.blocks[0, i].cols for i in range(self.blockshape[1])]
+        sizes = []
+        for i in range(self.blockshape[1]):
+            block = self.blocks[0, i]
+            if hasattr(block, 'cols'):
+                sizes.append(block.cols)
+            else:
+                # Handle Zero objects or other objects without cols attribute
+                # This should not normally happen in well-formed BlockMatrix
+                # but we need to be defensive
+                sizes.append(1)  # fallback size
+        return sizes
     def structurally_equal(self, other):
         return (isinstance(other, BlockMatrix)
     def _blockmul(self, other):
         if (isinstance(other, BlockMatrix) and
                 self.colblocksizes == other.rowblocksizes):
+            return BlockMatrix(self.blocks*other.blocks)
+            # Multiply the blocks
+            result_blocks = self.blocks*other.blocks
+            # Convert Zero objects back to ZeroMatrix objects
+            from sympy import S
+            from sympy.matrices.expressions.matexpr import ZeroMatrix
+            # Get row and column sizes directly from the original blocks
+            # to avoid issues with Zero objects in the result
+            print(f"DEBUG: self.blockshape[0] = {self.blockshape[0]}")
+            self_row_sizes = []
+            for i in range(self.blockshape[0]):
+                print(f"DEBUG: Getting block self.blocks[{i}, 0]")
+                block = self.blocks[i, 0]
+                print(f"DEBUG: block type = {type(block)}")
+                if hasattr(block, 'rows'):
+                    print(f"DEBUG: block.rows = {block.rows}")
+                    self_row_sizes.append(block.rows)
+                else:
+                    # If block doesn't have rows attribute, it might be a Zero
+                    # In this case, we need to infer the size from the structure
+                    # This should not happen in well-formed BlockMatrix
+                    print(f"DEBUG: Block has no rows attribute, using fallback")
+                    self_row_sizes.append(1)  # fallback
+            other_col_sizes = []
+            for j in range(other.blockshape[1]):
+                print(f"DEBUG: Getting block other.blocks[0, {j}]")
+                block = other.blocks[0, j]
+                print(f"DEBUG: block type = {type(block)}")
+                if hasattr(block, 'cols'):
+                    print(f"DEBUG: block.cols = {block.cols}")
+                    other_col_sizes.append(block.cols)
+                else:
+                    # If block doesn't have cols attribute, it might be a Zero
+                    # In this case, we need to infer the size from the structure
+                    # This should not happen in well-formed BlockMatrix
+                    print(f"DEBUG: Block has no cols attribute, using fallback")
+                    other_col_sizes.append(1)  # fallback
+            # Create a new matrix with Zero objects replaced by ZeroMatrix objects
+            print(f"DEBUG: result_blocks.shape = {result_blocks.shape}")
+            new_blocks = []
+            for i in range(result_blocks.shape[0]):
+                row = []
+                for j in range(result_blocks.shape[1]):
+                    elem = result_blocks[i, j]
+                    print(f"DEBUG: result_blocks[{i},{j}] = {elem}, type = {type(elem)}")
+                    print(f"DEBUG: elem == S.Zero: {elem == S.Zero}")
+                    print(f"DEBUG: hasattr(elem, 'is_Matrix'): {hasattr(elem, 'is_Matrix')}")
+                    if elem == S.Zero and not hasattr(elem, 'is_Matrix'):
+                        # Convert Zero to ZeroMatrix with appropriate dimensions
+                        print(f"DEBUG: Converting Zero to ZeroMatrix({self_row_sizes[i]}, {other_col_sizes[j]})")
+                        row_size = self_row_sizes[i]
+                        col_size = other_col_sizes[j]
+                        elem = ZeroMatrix(row_size, col_size)
+                        print(f"DEBUG: New elem type = {type(elem)}")
+                    row.append(elem)
+                new_blocks.append(row)
+            print(f"DEBUG: About to create BlockMatrix with new_blocks")
+            return BlockMatrix(new_blocks)
         return self * other

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