SQL Server Data Tools 2015 installation error

Question

I'm trying to install SQL Server Data Tools - Visual Studio 2015, but I keep getting an "Unspecified error".

The log file is at https://drive.google.com/open?id=0B3CEKzS2Sw8OODNJOXZJVGRWQlU.

I already have Visual Studio Professional 2015 installed.

I want to install SSDT 2015 because my databases were recently migrated from SQL Server 2008 R2 to 2014, and I need to use SSIS. Previously, I used SQL Server Business Intelligence Development Studio to create my DTS packages, which I still have installed to access old packages.

I've tried to find a resolution to my problem but everything seems to be about VS 2013 installation issues.

Please let me know if I need to provide more information.

Here's the relevant section from the linked log file.

[2308:24BC][2016-10-12T09:32:14]: Plan complete, result: 0x0
[2308:24BC][2016-10-12T09:32:14]: Apply begin
[287C:2C64][2016-10-12T09:32:14]: Creating a system restore point.
[287C:2C64][2016-10-12T09:32:21]: Created a system restore point.
[287C:2C64][2016-10-12T09:32:21]: Caching bundle from: 'C:\Users\JENMCC~1\AppData\Local\Temp\{2e9e05c8-ae49-4af6-9121-fa821d1b5334}\.be\SSDTSetup.exe' to: 'C:\ProgramData\Package Cache\{2e9e05c8-ae49-4af6-9121-fa821d1b5334}\SSDTSetup.exe'
[287C:2C64][2016-10-12T09:32:21]: Registering bundle dependency provider: {2e9e05c8-ae49-4af6-9121-fa821d1b5334}, version: 14.0.60923.0
[2308:28AC][2016-10-12T09:32:21]: Prompt for source of package: DotNet46, payload: DotNet46, path: U:\Downloads\Microsoft\SSDT\SSDT 2015\payload\neutral\NDP461-KB3102436-x86-x64-AllOS.exe
[2308:28AC][2016-10-12T09:32:21]: Acquiring package: DotNet46, payload: DotNet46, download from: https://go.microsoft.com/fwlink/?LinkId=715689
[2308:28AC][2016-10-12T09:32:21]: Error 0x80072ee7: Failed to send request to URL: https://go.microsoft.com/fwlink/?LinkId=715689
[2308:28AC][2016-10-12T09:32:21]: Error 0x80072ee7: Failed to send request to URL: https://go.microsoft.com/fwlink/?LinkId=715689
[2308:28AC][2016-10-12T09:32:21]: Error 0x80072ee7: Failed to connect to URL: https://go.microsoft.com/fwlink/?LinkId=715689
[2308:28AC][2016-10-12T09:32:21]: Error 0x80072ee7: Failed to get size and time for URL: https://go.microsoft.com/fwlink/?LinkId=715689
[2308:28AC][2016-10-12T09:32:21]: Error 0x80072ee7: Failed attempt to download URL: 'https://go.microsoft.com/fwlink/?LinkId=715689' to: 'C:\Users\JENMCC~1\AppData\Local\Temp\{2e9e05c8-ae49-4af6-9121-fa821d1b5334}\DotNet46'
[2308:28AC][2016-10-12T09:32:21]: Error 0x80072ee7: Failed to acquire payload from: 'https://go.microsoft.com/fwlink/?LinkId=715689' to working path: 'C:\Users\JENMCC~1\AppData\Local\Temp\{2e9e05c8-ae49-4af6-9121-fa821d1b5334}\DotNet46'
[2308:28AC][2016-10-12T09:32:21]: Failed to acquire payload: DotNet46 to working path: C:\Users\JENMCC~1\AppData\Local\Temp\{2e9e05c8-ae49-4af6-9121-fa821d1b5334}\DotNet46, error: 0x80072ee7.
[2308:28AC][2016-10-12T09:32:21]: Applied non-vital package: DotNet46, encountered error: 0x80072ee7. Continuing...
[2308:28AC][2016-10-12T09:32:21]: Prompt for source of package: adalsql13X64, payload: adalsql13X64, path: U:\Downloads\Microsoft\SSDT\SSDT 2015\payload\x64\adalsql.msi
[2308:28AC][2016-10-12T09:32:21]: Acquiring package: adalsql13X64, payload: adalsql13X64, download from: https://go.microsoft.com/fwlink/?LinkId=817285&clcid=0x409
[2308:28AC][2016-10-12T09:32:21]: Error 0x80072ee7: Failed to send request to URL: https://go.microsoft.com/fwlink/?LinkId=817285&clcid=0x409
[2308:28AC][2016-10-12T09:32:21]: Error 0x80072ee7: Failed to send request to URL: https://go.microsoft.com/fwlink/?LinkId=817285&clcid=0x409
[2308:28AC][2016-10-12T09:32:21]: Error 0x80072ee7: Failed to connect to URL: https://go.microsoft.com/fwlink/?LinkId=817285&clcid=0x409
[2308:28AC][2016-10-12T09:32:21]: Error 0x80072ee7: Failed to get size and time for URL: https://go.microsoft.com/fwlink/?LinkId=817285&clcid=0x409
[2308:28AC][2016-10-12T09:32:21]: Error 0x80072ee7: Failed attempt to download URL: 'https://go.microsoft.com/fwlink/?LinkId=817285&clcid=0x409' to: 'C:\Users\JENMCC~1\AppData\Local\Temp\{2e9e05c8-ae49-4af6-9121-fa821d1b5334}\adalsql13X64'
[2308:28AC][2016-10-12T09:32:21]: Error 0x80072ee7: Failed to acquire payload from: 'https://go.microsoft.com/fwlink/?LinkId=817285&clcid=0x409' to working path: 'C:\Users\JENMCC~1\AppData\Local\Temp\{2e9e05c8-ae49-4af6-9121-fa821d1b5334}\adalsql13X64'
[2308:28AC][2016-10-12T09:32:21]: Failed to acquire payload: adalsql13X64 to working path: C:\Users\JENMCC~1\AppData\Local\Temp\{2e9e05c8-ae49-4af6-9121-fa821d1b5334}\adalsql13X64, error: 0x80072ee7.
[287C:2500][2016-10-12T09:32:21]: Removing cached package: DotNet46, from path: C:\ProgramData\Package Cache\83D048D171FF44A3CAD9B422137656F585295866\
[287C:2500][2016-10-12T09:32:21]: Unable to remove cached package: DotNet46, from path: C:\ProgramData\Package Cache\83D048D171FF44A3CAD9B422137656F585295866\, reason: 0x80070003. Continuing...
[2308:24BC][2016-10-12T09:32:21]: Error 0x80072ee7: Failed while caching, aborting execution.
[287C:2C64][2016-10-12T09:32:21]: Removed bundle dependency provider: {2e9e05c8-ae49-4af6-9121-fa821d1b5334}
[287C:2C64][2016-10-12T09:32:21]: Removing cached bundle: {2e9e05c8-ae49-4af6-9121-fa821d1b5334}, from path: C:\ProgramData\Package Cache\{2e9e05c8-ae49-4af6-9121-fa821d1b5334}\
[2308:24BC][2016-10-12T09:32:22]: Apply complete, result: 0x80072ee7, restart: None, ba requested restart:  No

Answer 1

The error is unable to send request, so you can try install with offline. Here is the detail: "An ISO image of SSDT can be used as an alternative way to install SSDT or to set up an Administrative Installation point." https://msdn.microsoft.com/en-us/mt186501