There are two options in DBT; auto (dbtv2.pl) and manual (dbtv1_2.pl). It is worth mentioning the difference between two options here itself, though separate tutorials have been provided for both.

dbtv2.pl helps in building dendrimer (polymers; linear or branched) just with single click on "sander minimization" button. With this user can build one dendrimer generation as well as number  of generations in just single run.

dbtv1_2.pl helps in building manually. Here one can build dendrimer layer by layer. This option one should not use unless the dendrimer system is too complex to be handled. There can be such systems one would like to handle or may encounter. One has to do more manual clicks (e.g. "sander minimization" clicks one by one as layers are added) which can be useful for 'heavy systems'.

Please make sure and apply following modifications (for AmberTools1.2):

1) Edit line 366 in top2mol2.c (in the /src/antechamber directory)
 

fprintf(fpout, "%7ld %-8s%10.4lf%10.4lf%10.4lf %-6s%5ld %-8s%10.4lf\n", tmpint, atomname[i].str,

TO

fprintf(fpout, "%7ld %-8s%10.4lf%10.4lf%10.4lf %-6s%5ld %-8s%10.6lf\n", tmpint, atomname[i].str,

2) go to  /src/antechamber and type this in your terminal:

make install
(if getting error see FAQ number 2)
it will recompile the things in antechamber directory alone (which has required top2mol2.c)

Tutorial with example