diff --git a/doc/erko_howto_tools.txt b/doc/erko_howto_tools.txt
index 63780a01fe679b928b4076062cbfea2b0652b842..a6da5816e277872bc777f9cced728624b9198949 100755
--- a/doc/erko_howto_tools.txt
+++ b/doc/erko_howto_tools.txt
@@ -32,6 +32,7 @@
 * Drawio
 * DTS-lab unb2c
 * Flake8, black
+* MATLAB
 
 
 
@@ -1613,3 +1614,19 @@ export PATH=~/.local/bin:$PATH
 
 # run flake8 in dir, to check all py files in that dir and below
 > flake8
+
+
+*******************************************************************************
+* MATLAB
+*******************************************************************************
+
+Can't reload '/usr/loca​l/MATLAB/R​2018a/bin/​glnxa64/libmwcoder_types.so'
+
+FIx:
+
+> ll /usr/local/MATLAB/R2018a/bin/glnxa64/
+> sudo mkdir /usr/local/MATLAB/R2018a/bin/glnxa64/exclude
+> cd /usr/local/MATLAB/R2018a/bin/glnxa64/
+> sudo mv libmwcoder_types.so exclude/
+
+restart matlab