Hello everyone!

I am trying to install MUMmer 3.9.4 on Ubuntu, following the instructions given here: https://github.com/gmarcais/mummer/blob/master/INSTALL.md

When I try to run nucmer, I get this error message:

> nucmer: error while loading shared libraries: libumdmummer.so.0:
> cannot open shared object file: No such file or directory

I have tried to look it up online, but can't seem to find anything.

Any help would be greatly appreciated!

Nancy
@nancydong20
I had the same problem as you, I did these steps and it helped:

 1. This is critical: Uninstall the existing MUMmer with Synaptic Package Manager. (If you install with `sudo apt-get install mummer`you get v 3.22 and it is still called by any software which you use. This is why you cannot use the option *CPPFLAGS="-O3 -DSIXTYFOURBITS"* to install 64-bit Mummer).
 2. Download the stable MUMer distro 3.23 from https://github.com/gmarcais/mummer
 3. Extract the package
 4. Install MUMer with this code:
 5. `cd MUMmer3.23`
 6. `mkdir aux_bin`
 7.  `make check`
 8. `make install CPPFLAGS="-O3 -DSIXTYFOURBITS"`
 9.  ` mummerpath=`pwd` `
 10. `cd ..`
 11. `export PATH=$mergerpath:$mummerpath:$PATH`

In the end you will get:

 - (maximum reference length is 2305843009213693948)
 - (maximum query length is 18446744073709551615)
 - process 6420479 characters per dot

My OS Ubuntu 14, 64 bit. 
Hope it helps.