Ssis-171

The SSIS-171 error is often related to issues with the package execution, commonly occurring when there are problems with the connections, package validation, or during the runtime of the package. This error can manifest in various scenarios, such as:

| ✅ Check | How to Verify | What to Do If It Fails | |----------|---------------|------------------------| | Component version matches the server | Open the package in SSDT/BIDS → Right‑click the component → Properties → Version. Compare with the version of the DLL in C:\Program Files\Microsoft SQL Server\<major>\DTS\Binn. | Re‑compile the component against the current SSIS SDK (SQL Server Data Tools) or install the matching SSIS Feature Pack for the server version. | | Bitness matches execution mode | In the Project → Properties → Debugging → Run64BitRuntime (True/False). Also check the Agent job step “Use 32‑bit runtime”. | Switch the runtime flag to match the component, or replace the component with a 64‑bit version (most third‑party vendors ship both). | | DLL present & registered | Browse the Binn folder or run gacutil -l | find "MyComponent" in a Developer Command Prompt. | Copy the DLL to the Binn folder and run gacutil /i MyComponent.dll (or use the MSI installer from the vendor). | | TargetServerVersion is correct | In SSDT → Project → Properties → TargetServerVersion (SQL Server 2012/2014/2016/2017/2019/2022). | Change the property to the version of the server you will execute on, then re‑save the package. | | Custom component is signed (required on newer platforms) | Open the component DLL in ILSpy or dotPeek → check for a strong name. | Re‑sign the component with a strong name key, or ask the vendor for a signed build. |

If all the above checks pass and you still get 171, proceed to the deeper diagnostics in Section 3. SSIS-171

Below is a single, repeatable workflow you can copy into a PowerShell script or run manually. It covers the three most frequent root causes (version, bitness, missing assembly).

⚠️ Prerequisite: You must have admin rights on the SSIS server and the SQL Server Data Tools (SSDT) version that matches the target SQL Server. The SSIS-171 error is often related to issues

# 3️⃣ Force package to run 64‑bit (most production servers)
$proj.PropertyGroup.Run64BitRuntime = "true"
$proj.Save($dtprojPath)
Write-Host "Run64BitRuntime = true"

If you must run 32‑bit (e.g., legacy Jet/ACE drivers), set it to false and also edit the SQL Agent job step:

EXEC msdb.dbo.sp_update_jobstep
    @job_name = N'MySSISJob',
    @step_id = 1,
    @subsystem = N'SSIS',
    @command = N'/ISSERVER "\SSISDB\MyFolder\MyProject\MyPackage.dtsx" /CHECKPOINTING OFF /X86';

# 7️⃣ Use dtexec to validate only (no execution)
$dtexec = "C:\Program Files\Microsoft SQL Server\150\DTS\Binn\DTExec.exe"
& $dtexec /ISSERVER "\SSISDB\MyFolder\MyProject\MyPackage.dtsx" /VALIDATE

You should see:

Package validation succeeded.

If you still get 171, repeat Section 3 diagnostics to catch any secondary component.

If you have a custom Script Task/Component, you can unit‑test it: Below is a single, repeatable workflow you can

// In a console app referencing Microsoft.SqlServer.Dts.Runtime
Package pkg = new Package();
DtsComponentMetaData100 comp = pkg.ComponentMetaDataCollection.New();
comp.ComponentClassID = "GUID";

If the console app throws COMException (0x80040154) → Class not registered, confirming a registration issue.