diff --git a/java/bootclasspath_fragment.go b/java/bootclasspath_fragment.go
index d7525ec..8fe362a 100644
--- a/java/bootclasspath_fragment.go
+++ b/java/bootclasspath_fragment.go
@@ -145,11 +145,6 @@
 		ctx.ModuleErrorf(`neither of the "image_name" and "contents" properties have been supplied, please supply exactly one`)
 	}
 
-	if len(contents) != 0 {
-		// Nothing to do.
-		return
-	}
-
 	imageName := proptools.String(m.properties.Image_name)
 	if imageName == "art" {
 		// TODO(b/177892522): Prebuilts (versioned or not) should not use the image_name property.
@@ -181,7 +176,7 @@
 				continue
 			}
 			if !m.AvailableFor(apex) {
-				ctx.ModuleErrorf("incompatible with ArtApexJars which expects this to be in apex %q but this is only in apexes %q",
+				ctx.ModuleErrorf("ArtApexJars configuration incompatible with this module, ArtApexJars expects this to be in apex %q but this is only in apexes %q",
 					apex, m.ApexAvailable())
 				continue
 			}
@@ -193,6 +188,11 @@
 			}
 		}
 
+		if len(contents) != 0 {
+			// Nothing to do.
+			return
+		}
+
 		// Store the jars in the Contents property so that they can be used to add dependencies.
 		m.properties.Contents = modules.CopyOfJars()
 	}