Fills gaps in FE from elements selected on both sides of the gap.
    Syntax
      
      *fill_fe_gaps_elems
        mode mark_id1 mark_id2 max_width string_array number_of_strings
    
    Type
      
      HyperMesh Tcl Modify Command
    
    Description
      
      Fills gaps in FE from elements selected on both sides of the gap.
    
    Inputs
      
      
        
          - mode
- 0 - The input elements are the shell elements defining the boundary, and the gap
            boundaries are.
- 1 - The input elements are 1D elements defining directly the gap boundaries.
- mark_id1
- The mark ID containing the elements at the first boundary. Valid values are 1 and 2.
- mark_id2
- The mark ID containing the elements at the second boundary. Valid values are 1 and 2.
- max_width
- Maximum allowed gap width to be filled.
- string_array
- The string array ID that contains the additional input parameters. The string array is
            created using the *createstringarray command. This should always be
            set to 1. 
- Strings are indicated using the format "name: value". Valid strings are:
              
                - AdjacentComp
- 0 - Fill elements should be created in a new component.
- 1 - Fill elements should be created in the adjacent component.
- 2 - Fill elements should be created in the current component.
- ByFeature
- 0 - Features should not be considered.
- 1 - Features should be considered.
- CurvedFill
- 0 - Gaps are filled without taking into consideration the shape of adjacent
                  elements.
- 1 - Gaps are filled taking into consideration the shape of adjacent elements,
                  ensuring a smooth fi.
- DefineMaxWidth
- 0 - Ignore max_width for gap filling.
- 1 - Consider max_width for gap filling.
- GuideNodePairs
- Specifies an optional list of node IDs in the form "M1 M2 N1 N2 O1 O2 ..." where
                  (M1, M2), (N1, N2) and (O1, O2) are node pairs. These pairs are used to divide the
                  gap to be filled into smaller loops. When provided, gaps are filled ensuring that
                  the loops are split at the specified pairs. This aids in filling complex hole
                  shapes by guiding the filling process correctly.
- Remesh
- 0 - Fill elements should not be remeshed.
- 1 - Fill elements should be remeshed.
 
- number_of_strings
- Integer indicating the size (number of strings) in the string array created using
              *createstringarray.
Example
      
      To fill gaps less than 100 between elements in comps 1 and 5, including
        remeshing:
*createmark elems 1 "by comp id" 1
*createmark elems 2 "by comp id" 5
*createstringarray 2 "Remesh: 1" "DefineMaxWidth: 1"
*fill_fe_gaps_elems 0 1 2 100.0 1 2
To fill gaps between features of two sets of elements using a gap width of 50, and using
        guide node pairs for correct
        triangulation:
*createmark elems 1 12-18 55-100
*createmark elems 2 45-50 101-166
*createstringarray 4 "ByFeature:1" "Remesh:0" "DefineMaxWidth:1" "AdjacentComp:1" "GuideNodePairs:17 18 25 66"
*fill_fe_gaps_elems 0 1 2 10 1 4
Errors
      
      Incorrect usage results in a 
Tcl error. To detect
        errors, you can use the 
catch
        command:
if { [ catch {command_name...} ] } {
   # Handle error
}