autocad plugin to scan for any precision number in line's length ?

[imissu2]

Good evening, 

My problem is when I draw lines and found out later that it's not perfect length I want them to be.
For example if I want to draw 30cm line, when I measure it, it's 30.00cm. 
But when I open precision to be 0.0000cm it came out as 30.0004 cm.

If I have to measure the whole drawing line by line, it'll be a lot of time.
Does it has any script to scan the whole file and show me which line have that problem?

Wat

[dbroad]

How are you drawing the lines?  OSNAP, SNAP, keyboard entry?  Ultimately decimal numbers will all have some variation at the 14th significant figure but 30.0004 may indicate a problem in technique.  As long as you set a reasonable level of dimesnional accuracy though, you should be able to use those lines in almost any real work.  Think of the tolerances actually used in architecture.