Weird going ons with overwriting variables

[NotSoCunning]

Hi this is my first post here after being recommended by a colleague so go easy. I'm also relatively new to Crystal Reports.

I'm having a problem that when I grab a DateTime field from the database it erases another variable completely even if it's assigned afterwards.

E.g.
Local DateTimeVar date3;
Local DateTimeVar date4;
Local DateVar date2;
Local DateVar anotherdate;

date4 := {Applications.dteValuationDueDate};
anotherdate := DateValue(date4);
date3 := {Applications.dtePaymentExpected};
date2 := DateValue(date3);

As soon as date3 gets assigned date4 gets wiped. I can't see any reason why it should. Later on in the code I have to test the value of date4 so it becomes somewhat problematic.

Anyone with any ideas?

 

[NotSoCunning]

Missed a bit of vital information, this only occurs when date3 is empty. If it contains information then it works fine.

 

[NotSoCunning]

Solved, Crystal Reports simply decided it wasn't going to process valid code correctly. Copied it, Deleted it, recreated it and it worked a treat.