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MSPException

MSPException[type]
an exception that can be thrown by webMathematica page commands

MORE INFORMATION

A number of MSP commands throw an MSPException when some error situation occurs. These are caught by the page processing code, but it would be permissible for a page author to catch them and process them in some intermediate step.

The following exceptions can be thrown by MSPBlock.

	MSPException["ParseError"]	if the value cannot be interpreted by Mathematica
	MSPException["SecurityError"]	if the value does not pass the security test
	MSPException["ValueError"]	if the value is not a string, this indicates a programmatic error by the page author
	MSPException["VariableError"]	if the variable is not a Mathematica symbol, this indicates a programmatic error by the page author
	MSPException["NoValueError"]	if a variable has no value
	MSPException["VersionError"]	if a version mismatch problem is found

Basic Examples (1)

If a variable cannot be interpreted, a ParseError exception is thrown. Since the values may be entered from the client, this does not indicate an author error.

If the result of interpretation does not pass the security check, a SecurityError exception is thrown. Since the values may be entered from the client, this does not indicate an author error.

If a variable that is not a Mathematica symbol is encountered, a VariableError exception is thrown. This usually indicates an author error.

If a value that is not a Mathematica string is encountered, a ValueError exception is thrown. This usually indicates an author error.

webMathematica User Guide

Handling Errors in webMathematica User Guide

Security in webMathematica User Guide

Mathematica Web Functions in webMathematica User Guide