Since BDC is interface between SAP and Non-SAP, is it possible? Explain with example

in pa30 system is not letting me to create personnel no .it is giving error like no entries were found in table T503,i was generated numeric feature ,defined number ranges ,integrated om &pa .i checked in table entries were there but system is not letting me to create personnel no .please any one rectify this problem .

Is there any coding? Where it can written? What is it? Mention coding?

How can you enhance the ABAP Report?

What is Fund Management System in SAP? If they suggest massage no.3G473 How can we cure this query?

What is a variant configuration?

What is mean by internal format & external format in sap-abap/4? where it can be used? and how can we use it?

What are uses of constants?

What are the various resolution softwares available in the market for resolving SAP issues/tickets? Which of those is the best???

How do you improve the info cube design preformance?