Error message

• Notice: tempnam(): file created in the system's temporary directory in drupal_tempnam() (line 2657 of includes/file.inc).
• Warning: file_put_contents(temporary://filezV6Jrs): Failed to open stream: "DrupalTemporaryStreamWrapper::stream_open" call failed in file_unmanaged_save_data() (line 2024 of includes/file.inc).
• The file could not be created.
• Notice: tempnam(): file created in the system's temporary directory in drupal_tempnam() (line 2657 of includes/file.inc).
• Warning: file_put_contents(temporary://fileI8kGYv): Failed to open stream: "DrupalTemporaryStreamWrapper::stream_open" call failed in file_unmanaged_save_data() (line 2024 of includes/file.inc).
• The file could not be created.
• Notice: tempnam(): file created in the system's temporary directory in drupal_tempnam() (line 2657 of includes/file.inc).
• Warning: file_put_contents(temporary://filefwj8xa): Failed to open stream: "DrupalTemporaryStreamWrapper::stream_open" call failed in file_unmanaged_save_data() (line 2024 of includes/file.inc).
• The file could not be created.
• Notice: tempnam(): file created in the system's temporary directory in drupal_tempnam() (line 2657 of includes/file.inc).
• Warning: file_put_contents(temporary://filePjkDy4): Failed to open stream: "DrupalTemporaryStreamWrapper::stream_open" call failed in file_unmanaged_save_data() (line 2024 of includes/file.inc).
• The file could not be created.
• Notice: tempnam(): file created in the system's temporary directory in drupal_tempnam() (line 2657 of includes/file.inc).
• Warning: file_put_contents(temporary://filekB8098): Failed to open stream: "DrupalTemporaryStreamWrapper::stream_open" call failed in file_unmanaged_save_data() (line 2024 of includes/file.inc).
• The file could not be created.
• Notice: tempnam(): file created in the system's temporary directory in drupal_tempnam() (line 2657 of includes/file.inc).
• Warning: file_put_contents(temporary://filePzTvx9): Failed to open stream: "DrupalTemporaryStreamWrapper::stream_open" call failed in file_unmanaged_save_data() (line 2024 of includes/file.inc).
• The file could not be created.
• Notice: tempnam(): file created in the system's temporary directory in drupal_tempnam() (line 2657 of includes/file.inc).
• Warning: file_put_contents(temporary://fileEue6bF): Failed to open stream: "DrupalTemporaryStreamWrapper::stream_open" call failed in file_unmanaged_save_data() (line 2024 of includes/file.inc).
• The file could not be created.