Fix WOFileUtils

wo/core/fileutils.py

@@ -280,15 +280,15 @@ class WOFileUtils():
         """
             Searches for string in file and returns True or False.
         """
-        if os.path.isfile(fnm):
+        if os.path.isfile('{0}'.format(fnm)):
             try:
                 Log.debug(self, "Finding string {0} to file {1}"
                           .format(sstr, fnm))
-            for line in open(fnm, encoding='utf-8'):
-                if sstr in line:
-                    return True
-            return False
-        except OSError as e:
+                for line in open(fnm, encoding='utf-8'):
+                    if sstr in line:
+                        return True
+                return False
+            except OSError as e:
                 Log.debug(self, "{0}".format(e.strerror))
                 Log.error(self, "Unable to Search string {0} in {1}"
                           .format(sstr, fnm))