Sometimes, solids fail to join because they are either separated by an invisible gap or perfectly coincident. A common workaround involves a "near-identical" scale. Select one of the objects. Use the SCALE command and enter a factor of .
: Run AUDIT and RECOVER on the file to fix any underlying corruption that might be interfering with modeling operations. autocad error 18003
Understanding why this error happens can help you prevent it in future modeling sessions: Sometimes, solids fail to join because they are
: Attempting to perform Boolean operations on objects that are still part of a rather than basic solids. Drawing Corruption : Hidden errors within the file's database. Civil 3D Surface Issues autocad error 18003