diff --git a/pym/cl_builder.py b/pym/cl_builder.py
index 147394f..afd048b 100644
--- a/pym/cl_builder.py
+++ b/pym/cl_builder.py
@@ -241,7 +241,12 @@ class cl_builder(color_print):
             return False
         elif not self.clVars.Get('os_builder_linux_shortname') in \
             varsShare.dictNameSystem.keys():
-            self.printWARNING("Distributive is not Calculate Linux")
+            self.printERROR("Distributive is not Calculate Linux")
+            return False
+        elif not self.clVars.Get('cl_builder_kernel'):
+            self.printERROR("Can not detect kernel")
+        elif not self.clVars.Get('cl_builder_initrd_install'):
+            self.printERROR("Can not detect initramfs")
             return False
         elif not rescratch and path.exists(buildDirectory):
             self.printWARNING(
@@ -256,9 +261,9 @@ class cl_builder(color_print):
         sourceDirectory = self.clVars.Get('cl_builder_path')
         bindDirectory = pathJoin(buildDirectory,
                         self.clVars.Get('cl_builder_squash_path'))
+        self.printInfo()
         if not self.checkVariables():
             return False
-        self.printInfo()
         self.targetDistr = IsoDistributive(isoFile,bdirectory=buildDirectory)
         self.sourceDistr = DirectoryDistributive(sourceDirectory,
                                             mdirectory=bindDirectory)
@@ -284,9 +289,9 @@ class cl_builder(color_print):
         sourceDirectory = self.clVars.Get('cl_builder_path')
         bindDirectory = pathJoin(buildDirectory,
                         self.clVars.Get('cl_builder_squash_path'))
+        self.printRescratchInfo()
         if not self.checkVariables(rescratch=True):
             return False
-        self.printRescratchInfo()
         self.targetDistr = IsoDistributive(buildDirectory,
                                            bdirectory=buildDirectory)
         self.sourceDistr = DirectoryDistributive(sourceDirectory,