Please help with this, I received a file so heavy, all the layers was deleted but anyway the file continue so heavy , could somebody  tell me what can i do, I will apreciatte all your help.

Hey Bro,in AutoCAD 2015  use the PURGE command. Be sure to enable the checkbox labeled "Automatically purge orphaned data." For AutoCAD 2012, 2013, and 2014, there is the DGN Hotfix. then use audit command.or DXFOUT the full file.In a new file DXFIN the file created in previous step.After importing the DXF, generate a new DXF file (DXFOUT).In a new file DXFIN the file created in previous step.Purge all.Save the file.

Try thisPurge alternative command usinh lispCopy this code into the ***.lsp fileand load it apploadand use "purgee" commandHave a nice workOsman YILMAZ(vl-load-com)(defun c:purgee ()(command "qsave")(command "clayer" "0" "purge" "a" "*" "n")(command "qsave")(vlax-for n (vla-get-blocks                 (vla-get-activedocument (vlax-get-acad-object))) (vl-catch-all-apply 'vla-delete (list n)))(command "qsave")(vlax-for n (vla-get-layers                 (vla-get-activedocument (vlax-get-acad-object))) (vl-catch-all-apply 'vla-delete (list n)))(command "qsave")(vlax-for n (vla-get-linetypes              (vla-get-activedocument (vlax-get-acad-object))) (vl-catch-all-apply 'vla-delete (list n)))(command "qsave")(vlax-for n (vla-get-textstyles             (vla-get-activedocument (vlax-get-acad-object))) (vl-catch-all-apply 'vla-delete (list n)))(command "qsave")(vlax-for n (vla-get-registeredapplications (vla-get-activedocument (vlax-get-acad-object))) (vl-catch-all-apply 'vla-delete (list n)))(command "qsave")(command "audit" "Y" )(command "qsave")(command "clayer" "0" "purge" "a" "*" "n")(command "qsave")(princ))

Dear Forum,how to convert PDF file to Cad

Pancar: It is bad form to hijack a thread started by someone else on a totally different subject.  Next time start a new thread.You can find numerous PDF to DWG conversion programs using a simple Internet search.  Many offer a trial version.  Test a couple and then make your choice.  Be aware that many conversion programs do a relatively poor job and will cause you headaches when it comes time to edit the converted drawing.