Circular Dependencies

When loading (typically) EXF files with circular dependencies, one of the following occurs:

If you do not press CTRL, DTS starts loading the dependencies without checking for dependency loops.

If a loop is detected, you will receive following warning:

Dependency loop(s) were detected. All dependencies were removed. *** Reloading dependencies with detailed loop-detection. ***.

Note: If you are merging an EXF file into the current schedule, this would cause ALL existing dependencies to be removed as well before re-loading only the dependencies in the EXF file.
If you do one of the following, then DTS performs a circular dependency loop check while loading/merging the file:

Press CTRL when the loading process starts

Press CTRL when the dependency loading starts (it is tricky to find this point in time, so you would ideally keep CTRL pressed for a while)

Use the /loopcheck command line option.

Warning: Loading speed (specifically the loading of dependencies) can be significantly reduced with loop checking enabled.