When you import issues that link to already existing ones

Export issues to XLS (see how)
In the exported XLS, search for the column with the name "Linked Issues" (Picture 1)
And fill out the cells using the format <Description of the Issue Link> : <Issue Key> (<Name of the Link Type>)
1. For example: is blocked by : VP-269 (Blocks)
2. Learn more about the Issue Links Types here!
3. If you want to link more than one issue to an issue, write the codes into one cell and separate them with a semicolon
Copy the issues with the column names from the XLS, paste them into ImpEx's import dialog (see how) and finish the importing proccess (Picture 2)

You can use this template when you import:

(Just copy-paste them into the import dialog, but please make sure that you refer to the right project and the right issue.)

Project	Summary	Issue Type	Linked Issues
Project 1	Task 1	Task	is blocked by : DEMO-1 (Blocks); is blocked by : DEMO-2 (Blocks)
Project 1	Sub-task 1.1	Sub-task
Project 1	Sub-task 1.2	Sub-task

(Picture 1)

(Picture 2)

When you import issues that link to ones that have not been created yet

In the exported XLS create a new column named "Issue ID" and give random numbers the issues that you want to link (Picture 3)
Search for the column with the name "Linked Issues" (Picture 4)
Fill out the cells using the format <Description of the Issue Link>: <Issue ID> (<Name of the Link Type>)
1. For example: is blocked by: 1 (Blocks)
2. Learn more about the Issue Links Types here!
3. If you want to link more than one issue to an issue, write the codes into one cell and separate them with a semicolon
Copy the issues with the column names from the XLS, paste them into ImpEx's import dialog and finish the importing proccess (see how)

You can use this template when you import:

(Just copy-paste them into the import dialog, but please make sure that you refer to the right project and the right issue.)

Project	Summary	Issue Type	Issue ID	Linked Issues
Project 1	Task 1	Task	1	is blocked by: 1 (Blocks); is blocked by: 2 (Blocks)
Project 1	Sub-task 1.1	Sub-task	2
Project 1	Sub-task 1.2	Sub-task	3

(Picture 3)

(Picture 4)