diff --git a/IOB-WIN/IobOSAI.cs b/IOB-WIN/IobOSAI.cs
index 64a3ece5..c3d3f3d4 100644
--- a/IOB-WIN/IobOSAI.cs
+++ b/IOB-WIN/IobOSAI.cs
@@ -244,7 +244,7 @@ namespace IOB_WIN
 
       // è little endian (NON serve conversione)
       hasBigEndian = false;
-      lgInfo("Start init Adapter OSAI all'IP {0}:{1} per IOB {2}", IOBConf.cncIpAddr, IOBConf.cncPort, IOBConf.codIOB);
+      lgInfo("Start init Adapter OSAI all'IP/NOME{0}:{1} per IOB {2}", IOBConf.cncIpAddr, IOBConf.cncPort, IOBConf.codIOB);
 
       // Creo oggetto x gestione connessione/comunicazione NC: secondo il tipo creo CNDEX o OPEN
       parentForm.commPlcActive = true;
@@ -453,8 +453,12 @@ namespace IOB_WIN
             {
               // ora provo connessione...
               parentForm.commPlcActive = true;
-              OSAI_ref.OpenSession();
-
+              bool fatto = OSAI_ref.OpenSession();
+              if (!fatto)
+              {
+                // log errore!  
+                lgInfo("Impossibile effettuare apertura sessione: " + OSAI_ref.ErrMsg);
+              }          
               parentForm.commPlcActive = false;
               lgInfo("szStatusConnection: " + szStatusConnection);
               connectionOk = true;
diff --git a/Jenkinsfile b/Jenkinsfile
index b99dc056..7b2a2dd7 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -16,7 +16,7 @@ pipeline {
 
       /* calcolo numero versione... diverso x branch MASTER/DEVELOP */
       script {
-        withEnv(['NEXT_BUILD_NUMBER=304']) {
+        withEnv(['NEXT_BUILD_NUMBER=305']) {
           // env.versionNumber = VersionNumber(versionNumberString : '1.18.${BUILD_DATE_FORMATTED, "yyMM"}.${BUILDS_ALL_TIME}', projectStartDate : '2006-01-01', skipFailedBuilds: true)
           env.versionNumber = VersionNumber(versionNumberString : '1.18.${BUILD_DATE_FORMATTED, "yyMM"}.${BUILDS_ALL_TIME}', projectStartDate : '2006-01-01', skipFailedBuilds: true, overrideBuildsAllTime: '${NEXT_BUILD_NUMBER}')
           env.APP_NAME = 'MAPO-IOB-WIN'