diff --git a/Jenkinsfile b/Jenkinsfile
index a2f44ce8..364352c0 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -9,7 +9,7 @@ pipeline {
       steps {
       /* calcolo numero versione... diverso x branch MASTER/DEVELOP */
       script {
-        withEnv(['NEXT_BUILD_NUMBER=656']) {
+        withEnv(['NEXT_BUILD_NUMBER=657']) {
           // env.versionNumber = VersionNumber(versionNumberString : '3.0.${BUILD_DATE_FORMATTED, "yyMM"}.${BUILDS_ALL_TIME}', projectStartDate : '2006-01-01', skipFailedBuilds: true)
           env.versionNumber = VersionNumber(versionNumberString : '3.0.${BUILD_DATE_FORMATTED, "yyMM"}.${BUILDS_ALL_TIME}', projectStartDate : '2006-01-01', skipFailedBuilds: true, overrideBuildsAllTime: '${NEXT_BUILD_NUMBER}')
           env.APP_NAME = 'MAPO-IOB-WIN'
@@ -102,7 +102,9 @@ pipeline {
         script {
           // se è ramo IobMan compilo SOLO IOB-MAN...
           if(env.BRANCH_NAME == "IobMan") {      
-            env.classifier = ""      
+            env.classifier = ""   
+            // rimuovo vecchio zip...
+            bat "del /f ${WORKSPACE}\\Releases\\${env.BRANCH_NAME}\\*.zip"   
             // Compressione in .zip dell'installer...
             bat "e:\\7za.exe a -tzip ${WORKSPACE}\\Releases\\${env.BRANCH_NAME}\\MAPO-IOB-MAN.zip ${WORKSPACE}\\IOB-MAN\\bin\\*"
             // ora mi occupo delle operazioni di invio a NEXUS...