diff --git a/README.md b/README.md
index d3daef4..b15554e 100644
--- a/README.md
+++ b/README.md
@@ -153,6 +153,7 @@ TBD
 
 # Troubleshooting
 
+- Please check compile and installation logs. They might contain interesting information.
 - Did you calibrate your daughterboard?
 - Did you run volk_profile?
 - Did you try different gain settings?
diff --git a/swig/CMakeLists.txt b/swig/CMakeLists.txt
index 683be3e..cf93fd1 100644
--- a/swig/CMakeLists.txt
+++ b/swig/CMakeLists.txt
@@ -21,6 +21,7 @@
 find_package(SWIG)
 find_package(PythonLibs 2)
 if(NOT SWIG_FOUND OR NOT PYTHONLIBS_FOUND)
+    message(FATAL_ERROR "Python or Swig not found (or version not supported).")
     return()
 endif()
 include(GrSwig)