I found a way by myself utilizing a dummy table which has 1000 rows of autogenerated numbers.
Before storing tables into qvds, i check the size of this table using a simple if-then-else statement. if the size is equal to or below 10, i do not let STORE commands execute. Since this dummy table is also affected and narrowed down in row count during a limited load, this would help me a lot. Of course loading more than 10 records will not be considered as a limited load in this script but we mostly use 10 records as default.
ROWCOUNT: load iterno() as row autogenerate(1) while iterno() <=1000;
if NoOfRows('ROWCOUNT')>10 then
STORE Table1 INTO Table1.Qvd;
Drop table ROWCOUNT;