diff --git a/src/common/informixHelper.js b/src/common/informixHelper.js
index 5f78dc1..6fab794 100644
--- a/src/common/informixHelper.js
+++ b/src/common/informixHelper.js
@@ -104,14 +104,15 @@ function queryInformix (query) {
     try {
       dbConnection = informix.openSync(connectionString)
     } catch (ex) {
-      logger.error(`Informix connection error: ${ex}`)
+      logger.error(`Informix connection error: ${JSON.stringify(ex)}`)
+      return null
     }
   }
   let result = null
   try {
     result = dbConnection.querySync(query)
   } catch (ex) {
-    logger.error(`Informix query error: ${ex}`)
+    logger.error(`Informix query error: ${JSON.stringify(ex)}`)
   }
 
   return result