A PHP Error was encountered

Severity: Warning

Message: Missing argument 1 for Abstract_submission::forceDownload(), called in /var/www/html/system/core/CodeIgniter.php on line 532 and defined

Filename: controllers/Abstract_submission.php

Line Number: 248

Backtrace:

File: /var/www/html/application/modules/conference/controllers/Abstract_submission.php
Line: 248
Function: _error_handler

File: /var/www/html/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Notice

Message: Undefined variable: id

Filename: controllers/Abstract_submission.php

Line Number: 251

Backtrace:

File: /var/www/html/application/modules/conference/controllers/Abstract_submission.php
Line: 251
Function: _error_handler

File: /var/www/html/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Notice

Message: Undefined index: file_path

Filename: controllers/Abstract_submission.php

Line Number: 253

Backtrace:

File: /var/www/html/application/modules/conference/controllers/Abstract_submission.php
Line: 253
Function: _error_handler

File: /var/www/html/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: file_get_contents(): Filename cannot be empty

Filename: controllers/Abstract_submission.php

Line Number: 253

Backtrace:

File: /var/www/html/application/modules/conference/controllers/Abstract_submission.php
Line: 253
Function: file_get_contents

File: /var/www/html/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Notice

Message: Undefined index: file_path

Filename: controllers/Abstract_submission.php

Line Number: 254

Backtrace:

File: /var/www/html/application/modules/conference/controllers/Abstract_submission.php
Line: 254
Function: _error_handler

File: /var/www/html/index.php
Line: 315
Function: require_once