In node and element records of your input format, should the number be sequentially continuous?

That is, is the following lines possible?

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ndofman 3 nelem 3 ncrosssect  1 nmat 1 nbc 2 nic 0 nltf  1
node 1 coords 3 0.  0.  0.  bc 2 1 1
node 5 coords 3 5.  0.  0.  bc 2 0 1   lcs 6 0.8660254 0.0 0.5 0.0 1.0 0.0
node 7 coords 3 0.  0. 10.  bc 2 0 0  load 1 2
Truss2d 1 nodes 2 1 5 mat 1 crossSect 1
Truss2d 2 nodes 2 1 7 mat 1 crossSect 1
Truss2d 4 nodes 2 5 7 mat 1 crossSect 1

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In the test samples, our attempts were failed.

We do not always do continuous numbering of nodes and elements since they are often inserted and deleted in our problem domain.

Thanks

Cheolho Ryu