diff -r 90187946d1a4 -r 3c43b07e12b7 src/goodjava/xml/XmlElement.java
--- a/src/goodjava/xml/XmlElement.java	Sun May 12 17:15:33 2024 -0600
+++ b/src/goodjava/xml/XmlElement.java	Sun May 12 22:00:42 2024 -0600
@@ -29,15 +29,15 @@
 
 	public void setContent(String content) {
 		if( content == null )
-			throw new IllegalArgumentException("content can't be null");
+			throw new IllegalArgumentException("content of '"+name+"' can't be null");
 		this.content = content;
 	}
 
 	public void setContent(XmlElement[] content) {
 		if( content == null )
-			throw new IllegalArgumentException("content can't be null");
+			throw new IllegalArgumentException("content of '"+name+"' can't be null");
 		if( content.length == 0 )
-			throw new IllegalArgumentException("content can't be empty");
+			throw new IllegalArgumentException("content of '"+name+"' can't be empty");
 		this.content = content;
 		for( XmlElement el : content ) {
 			el.parent = this;