VAMPIR_NOT_FOUND message at %%enable_vampir_launch_on_scorep_instrumented execution

Author: OutlyingWest

src/scorep_jupyter/kernel.py

@@ -900,7 +900,10 @@ async def do_execute(
 
         elif code.startswith("%%enable_vampir_launch_on_scorep_instrumented"):
             self.launch_vampir_requested = True
-            self.cell_output("Vampir will be launched after next instrumented execution.")
+            if shutil.which("vampir") is None:
+                self.log_error(KernelErrorCode.VAMPIR_NOT_FOUND)
+            else:
+                self.cell_output("Vampir will be launched after next instrumented execution.")
             return self.standard_reply()
         elif code.startswith("%%disable_vampir_launch"):
             self.launch_vampir_requested = False

src/scorep_jupyter/kernel_messages.py

@@ -45,7 +45,8 @@ class KernelErrorCode(Enum):
         "(looked in: {scorep_folder})"
     ),
     KernelErrorCode.VAMPIR_NOT_FOUND: (
-        "Vampir binary not found in PATH. Cannot launch visualization."
+        "Vampir binary not found in PATH. Add it to PATH to enable automatic launch"
+        " (e.g. via `%env PATH=/path/to/vampir/bin:$PATH`)."
     ),
 
     KernelErrorCode.VAMPIR_LAUNCH_FAILED: (