diff --git a/2.Analysis/3_ShortestPath/README.md b/2.Analysis/3_ShortestPath/README.md
index df1b7e4abe8fc1a828f76bd496476ea68b3169b9..e03a5e5b25ca5bd1619df59f7d39d0cd8a115f0f 100755
--- a/2.Analysis/3_ShortestPath/README.md
+++ b/2.Analysis/3_ShortestPath/README.md
@@ -26,9 +26,10 @@ In addition, the following are created:
 * The file **fullPathLength.dat** with the information of the previous point but for all the timesteps.
 * The file **histogramMathematica.pdf** with the frequency histogram for $\lambda$.
 
+Note that if you don't have X11 installed, you will need to open the Mathematica script (MinPathBranching.m) and run it as usual (shift+enter) to create the previous files.
 
 ## II.- Histogram of branching points
-The bash (**histogram\_freq.sh**) script has the instructions to run an AWK (**awk.histLmin**) script, which reads *fullPathLength.dat* and computes:
+The bash (**histogram\_freq.sh**) script has the instructions to run an AWK script (**awk.histLmin**), which reads *fullPathLength.dat* and computes:
 
 > *histogram.txt* with the frequency of $\lambda$ between branching points.
 >