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Abstract-The possible types of transition structures that can arise between the regions of vortex asymmetric domain walls that exist in magnetically uniaxial permalloy films with in plane anisotropy have been studied by the method of three dimensional computer simulation of the magnetization behavior. It has been estab lished that, along with the previously found structures of vertical Bloch lines (VBLs), other types of structures can exist, namely, singular (Bloch) points and clusters that consist of VBLs and Bloch points. Spatial config urations and topological characteristics of transition structures have been calculated numerically.