Try/catch is not working in AX 2012 / D365

Sometimes we see catch statement does not catch the errors even though the code looks good.

I was getting some errors while trying to create customers using below code. The code looks good for me. But, still not working.

while (resultSet.next())
{
    //some logic (...)

    ttsbegin;

    //This is a custom table that stores to where I want to integrate the given customer
    while select integrationCompany
            where integrationCompany.CRMCompany == customerInfo.parmCRMDataAreaId()
    {
        changeCompany(integrationCompany.ERPCompany)
        {
            try
            {
                customerInfo.createCustomer();

                //.. some more logic


            }
            catch
            {
                // My catch Block, that should update the source database to set
                // the processing status to "error"


                ttsAbort;
            }
        }
    }

    ttsCommit;

}

Reason: 
Because the try and catch statement is inside the transaction(ttsbegin and ttscommit) and this is what causing the issue.

Solution:

ttsbegin and ttscommit should be always inside the try and catch statements as shown below.

while (resultSet.next())
{
    //some logic (...)

    //This is a custom table that stores to where I want to integrate the given customer
    while select integrationCompany
            where integrationCompany.CRMCompany == customerInfo.parmCRMDataAreaId()
    {
        changeCompany(integrationCompany.ERPCompany)
        {
            try
            {

               ttsbegin;

              customerInfo.createCustomer();

                //.. some more logic

              ttscommit


            }
            catch
            {
                // My catch Block, that should update the source database to set
                // the processing status to "error";

               ttsbegin;

               //you update statement here

               ttscommit;
            }
        }
    }

}

For more details please refer : https://stackoverflow.com/questions/27529308/strange-behavior-with-try-catch-on-dynamics-ax-2012