Cydia Impactor is a tool developed by Saurik (Jay Freeman) that allows users to sideload IPA files onto their iOS devices without having to jailbreak them. It's commonly used for installing apps that are not available on the App Store or for testing apps during development.
If the app-specific password didn't work, Cydia Impactor might be choking because you have too many expired certificates on your account (max is typically 3).
Since line 37 involves teams.count != 1, you need to clear the slate.
Step 1: In Cydia Impactor, go to the top menu bar. Step 2: Click Xcode > Revoke Certificates. Step 3: Enter your Apple ID and App-Specific Password (or real password if 2FA is off). Step 4: Let Cydia Impactor revoke all active signing certificates.
Once revoked, try sideloading again. Your team count effectively returns to zero, allowing the script to create a fresh certificate. cydia impactor error line 37
On Windows, Cydia Impactor relies on iTunes drivers. If you have the Windows Store version of iTunes, uninstall it. Install the legacy desktop version from Apple’s website. The Windows Store version blocks the driver hooks Cydia Impactor needs.
If you are getting line 37 specifically while trying to install over an existing app:
This clears the corrupted provisioning profile that triggers a parsing error (line 37) during the overwrite attempt.
For developers and the curious, here is what is actually happening inside the ipa.cpp file. Cydia Impactor is a tool developed by Saurik
The original source code looks something like this (simplified):
// Line 30-40
json teams = result["teams"];
assert(teams.is_array());
assert(teams.size() == 1); // <-- THIS IS LINE 37
result is the JSON payload sent back from Apple’s authentication server. In 2019, Apple changed the structure of this payload. Instead of a clean array with one team, they began returning:
Because Saurik has not updated the code, the assert(teams.size() == 1) fails. The program has no instructions for "what to do if the array size is 0 or 2," so it throws the assertion error and crashes.
Unlike a generic "installation failed" message, "Line 37" refers to a specific line of code within Cydia Impactor’s source code. Specifically, you will see a log similar to this: This clears the corrupted provisioning profile that triggers
progress: Success
install: Failed (错误 37)
Or more explicitly:
file: ipa.cpp; line: 37; what:
assert(teams.count == 1)
The Translation: Line 37 is an assertion check. The code is trying to count the number of "teams" (development teams) associated with your Apple ID. You have zero, or more than one, and Cydia Impactor doesn't know which account to use.
If you are still getting "Line 37" errors, stop troubleshooting the old tool and switch to:
If you insist on using legacy Cydia Impactor (perhaps on an older iOS 12 device), follow these best practices to avoid line 37: