Why did I get result code -12?

During the attempt to process the transaction, the connection between your hosted server and PayPal payment hosted servers failed.

Here's how to resolve this issue:

1. Check PayPal Manager to determine whether the transaction has posted. If it hasn't, try again.
2. If you're using the Payflow SDK, try the following:

• Increase the timeout parameter value to 90
• Investigate the issue internally with packet sniffer software
• Remove memory- or resource-intensive applications running on the same box or create a dedicated server for the Payflow Pro SDK

If you're using a UNIX environment or have an open source tool (such as Cygwin), you can try the following commands to check connectivity:

• Run command line using cURL:
  curl -d -v https://pilot-payflowpro.paypal.com
• Run command line (OpenSSL):
  openssl s_client -connect payflowlink.paypal.com:443