I have been using autocad for quite sometime but there is this problem i just cannot find solution to.
When we create a block in a drawing, say we select three objects and combine them in a block format. In my autocad I cannot save it, the moment i hit save, all goes back to normal and those objects do not combine as block.

ps: i do enter the block name before hitting save.

please help me with this. My drawing is so heavy now because of so many individual lines.