Abstract The 12442 compounds are a recently discovered family of iron-based superconductors, that share several features with the cuprates due to their strongly anisotropic structure, but so far poorly understood. Here, we report on gap structure and anisotropy RbCa 2 (Fe 1− x Ni ) 4 As F single crystals, investigated by combination directional point-contact Andreev-reflection spectroscopy copl...