So, most programs like WB Mechanical will write out a CDB style input file. You can manually write on out in WB Mechanical by selecting the Solution tree object; then in the upper right there is an option to write the input file.
In MAPDL you can use the CDREAD command to read in the CDB file. In the MAPDL GUI it's in Main Menu -> Pre Processing -> Archive Model -> Read.
Otherwise you can use the /INPUT command to read in the input file [MAPDL Utility Menu -> File -> Read Input From].
The CDB format can include IGES of the CAD associated with the mesh. Most of the time this does not exist as most FEA pre-processors write out just the FEM information. So you can use /INPUT to read in the CDB file too (if it does not contain CAD data).
If the file extension is cdb then use the archive read function. If it is something like dat or inp use the /INPUT.
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