On importing the attached large, complex flashcard file a large number of error alert messages appear, one over the other like a deck of cards and the program hangs. I was unable to get the program to respond and had to kill it from the Windows XP task manager.
This complex a file may not be supported by ZDT but should probably be handled from an error perspective. Entries are multi-word phrases, some of which are over 30 characters long. Besides the potential issue with the size of the phrases the issue might also be related to the fact that I had to convert pre-existing pinyin with tone marks to pinyin with tone numbers to comply with the zdt file format. The conversion ended up placing tone numbers just following the letter they belonged to, in the middle of the word rather than at the end of the word.
Here's some info about the crash and machine:
JVM terminated. Exit code=1073807364
Windows XP 5.1.2600 SP2
Java 1.5.0 (build 1.5.0_11-b03)