hey Hai

Im working on solid 2D materials. when i apply the load over the materials i have formed im getting these errors.. 

in keyword *BOUNDARY, file "LSP-Dynamic.inp", line 144: Unknown assembly node set LSP-STATIC-1#SET-1

Surface definition assembly_surf-3 not found.

This model has either incorrect or no element definitions.

Analysis Input File Processor exited with an error.