Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

java.lang.IllegalArgumentException: Illegal group reference	at java.util.regex.Matcher.appendReplacement(	at org.apache.commons.mail.ImageHtmlEmail.replacePattern(	at org.apache.commons.mail.ImageHtmlEmail.buildMimeMessage(	at org.apache.commons.mail.Email.send(	at EmailSender.sendHTMLEmail(	at EmailSenderTest.testImageHtmlEmailDollarBackslash(