diff --git a/src/Agilent4uhv.cpp b/src/Agilent4uhv.cpp
index 3e29734db05e17b3c7d354a7b88b11f5854fcda9..8a278d421857549e72cc810ca3a4f191a1cb94b8 100644
--- a/src/Agilent4uhv.cpp
+++ b/src/Agilent4uhv.cpp
@@ -1809,6 +1809,7 @@ void* Agilent4uhvWorker::run_undetached(void * /*ptr*/)
 				it = device->polled_windows.begin();
 			}
 		} catch(Tango::DevFailed &e) {
+			ERROR_STREAM << string(e.errors[0].desc) << endl;
 			/* Restart from begin */
 			it = device->polled_windows.begin();
 			/* Set UNKNOWN state */