Export relationships to .xlsx Excel

No.

There are very clever commercial solutions to your problem.  Probably the best out-of-the-box solution is to export an XER file, and edit it. Not difficult, just not very automated.......

just do it in parts that equal 65000

Create a relationship report and add whatever column you want in it and save it in csv or txt format of your choice.

But if you are just looking for the complete list of relationships you really don't need any of them!

Go to Report window > click on the create new report button> Select activity relationships. select column that you need and group and sort and filter of your choice and run it ans save it as Delimited Text File and use CSV as the file extension. you can then open it in excel.

In case you are trying to modify those relationships you can use third party softwares. The best free software is XERfileparser. I don't get into that since I don't want to bore you with the details of how modify relationships directly in XER or by using the third party softwares.

Create a relationship report and add whatever column you want in it and save it in csv or txt format of your choice.

But if you are just looking for the complete list of relationships you really don't need any of them!

Go to Report window > click on the create new report button> Select activity relationships. select column that you need and group and sort and filter of your choice and run it ans save it as Delimited Text File and use CSV as the file extension. you can then open it in excel.

In case you are trying to modify those relationships you can use third party softwares. The best free software is XERfileparser. I don't get into that since I don't want to bore you with the details of how modify relationships directly in XER or by using the third party softwares.

Create a relationship report and add whatever column you want in it and save it in csv or txt format of your choice.

But if you are just looking for the complete list of relationships you really don't need any of them!

Go to Report window > click on the create new report button> Select activity relationships. select columns that you need (probably pred activity id, description, rel type, lag, successor act id and desc, etc)  and group and sort and filter of your choice and run it ans save it as Delimited Text File and use CSV as the file extension. you can then open it in excel.

In case you are trying to modify those relationships you can use third party softwares. The best free software is XERfileparser. I don't get into that since I don't want to bore you with the details of how modify relationships directly in XER or by using the third party softwares.