CloudConnect Transformation Language also provides a simple mechanism for catching and handling possible errors.

As the first step, a string variable must be declared:

After that, in the code of your transformation, you can use the following try-catch statement:

If Statement1 (a simple statement or a block of statements) is executed successfully, the graph does not fail and the processing continues.

On the other hand, if Statement1 fails, an exception is thrown and assigned to the MyException variable.

The MyException variable can be printed or managed other way.

Once the exception is thrown, graph fails unless another Statement2 (which fixes the failed Statement1) is executed.

In addition to it, since version 3.0 of CloudConnect, CTL1 uses a set of optional OnError() functions that exist to each required transformation function.

For example, for required functions (e.g., append(), transform(), etc.), there exist following optional functions:

appendOnError(), transformOnError(), etc.

Each of these required functions may have its (optional) couterpart whose name differs from the original (required) by adding the OnError suffix.

Moreover, every <required ctl template function>OnError() function returns the same values as the original required function.

This way, any exception that is thrown by the original required function causes call of its <required ctl template function>OnError() counterpart (e.g., transform() fail may call transformOnError(), etc.).

In this transformOnError(), any incorrect code can be fixed, error message can be printed to Console, etc.

	Important
	Remember that these OnError() functions are not called when the original required functions return Error codes (values less then -1)! If you want that some OnError() function is called, you need to use a raiseError(string arg) function. Or (as has already been said) also any exception thrown by original required function calls its OnError() counterpart.