I applied a glue contact between two meshes and it said 'successfully found a pair' However the glue ptach has a red cross and the glue has an exclamation mark in the tree.
I have seen this before when the bodies share only a single point or vertex of "contact" as opposed to an edge or face. (see image). I have also seen this when 2 bodies are "glued" but are not meshed. this can sometimes happen when you are gluing midsurface shell meshes but also select the solids (which are likely not meshed). there are likely other issues as well. but these are 2 that i have seen.
I have seen this before when the bodies share only a single point or vertex of "contact" as opposed to an edge or face. (see image). I have also seen this when 2 bodies are "glued" but are not meshed. this can sometimes happen when you are gluing midsurface shell meshes but also select the solids (which are likely not meshed). there are likely other issues as well. but these are 2 that i have seen.