Curated guide

Speed Test Upload Error

Troubleshoot upload test failures, inaccurate upload readings, and server-side errors in the legacy AuditMyPC speed test.

Problem Summary

The upload-error cluster is broader than one literal error message. In the archive, users described failed uploads, blank or broken upload readings, obviously inaccurate results, and tests that worked on one network but not another. The common thread was that the upload side depended on both the server endpoint and the conditions under which the measurement was taken.

This is also one of the riskiest legacy topics in the archive because older upload-test behavior can easily sound more authoritative than it really was. The archive is useful for failure patterns, not for treating one historic result as a universal truth about the line.

Comment Highlights

One IIS and PHP case had the post limit set high already, which shows that an upload error was not automatically solved by increasing one obvious server setting.
Another user saw different results on different networks, which is an important clue that some supposed upload bugs were really environment or path differences.
A separate report says the upload test on the server simply did not work from the user's location, which fits the recurring pattern of endpoint-specific failures rather than a bad browser alone.
The guide map also preserves the reminder to make sure the latest download package was in use before chasing every other explanation.

Likely Causes

The upload endpoint was misconfigured, missing, or inaccessible to the test runtime even though the download component worked.
Server-side request limits, permissions, or handler configuration were still incompatible with the upload payload despite apparently generous size settings.
The measurement path changed across networks, which made a server-specific bottleneck look like a universal upload-speed problem.
The packaged test files were outdated or incomplete, so users were troubleshooting around an already broken baseline.

What Still Applies

Validate the upload endpoint directly before arguing with the numeric result. An upload test is only as trustworthy as the server-side receiver behind it.
Compare results from more than one network and, if possible, more than one server. The archive repeatedly shows that path and hosting differences changed the outcome.
Keep upload troubleshooting separate from logging troubleshooting. A failed measurement can feed into Speed Test Logging Setup, but it is not the same issue.
Do not use one preserved upload test as a standalone verdict on a current broadband line. The safer lesson is to verify the endpoint, compare more than one path, and use current testing tools before trusting the number.
If the test never fully loads before the upload stage, compare the pattern with Speed Test Loading but Not Loading Fully on Broadband Speed Test Help.

Legacy Notes

Older upload-test logic and older server stacks make this a legacy-sensitive guide. Treat the comments as evidence about failure modes, not as a modern benchmarking standard.

Be especially careful with old archive claims about accuracy. The archive is better for diagnosing why the old package failed than for benchmarking a modern connection.

Related Guides

curated-guide

Parent Hub

hub

Broadband Speed Test Help

Legacy support hub for the AuditMyPC broadband speed test, covering installation, uploads, logging, and embed problems.