: If you are using a floating license, verify that your machine can reach the license server and that the license.dat file correctly points to the server's port and IP.
If you are using a generic IDE and see "QCC license check failed," the vendor has likely branded their FlexNet feature as "QCC." qcc license check failed
If the error is occurring with a specific app: : If you are using a floating license,
The root causes of this error are multifaceted, ranging from simple administrative oversights to complex network issues. The most straightforward cause is the expiration of a license. Commercial software licenses often operate on a subscription model or a specific term limit. When the current date surpasses the validity period defined in the license file or the license server, the QCC compiler is programmed to cease functioning, triggering the check failure. Similarly, a mismatch in hardware identifiers can cause this issue. Licensing software often ties a license to a specific hardware fingerprint, such as a MAC address or a host ID. If a user upgrades their network card, replaces a hard drive, or moves the software to a new machine without updating the license file, the verification process will fail because the hardware identity no longer matches the authorized credentials. Commercial software licenses often operate on a subscription
If the issue persists, it might be specific to your device or a more complex problem. Contacting the device manufacturer's support team can provide model-specific advice or indicate if there's a known issue.