At OJS-Services, we specialize in providing a range of services, including installation, updates, and troubleshooting for ADS, OPS, and OMP software. Our hosting service, fully compatible with OJS, is utilized by personal and corporate journals in dozens of countries. Drawing from our extensive experience working with clients, we have gained valuable insights into the diverse challenges they encounter. We take pride in our successful resolution of the issues faced by our customers. Below is a comprehensive list of bug issues that our clients have encountered, and for each, we have provided effective solutions. If you have experienced any of these issues, please feel free to contact us for prompt assistance in resolving the matter.

Resolved Bug List to Date

“Fatal error: Call to undefined function…”

“Error: Class ‘PKP\db\DAO’ not found”

“Error: The plugin ‘…’ could not be found”

“The file ‘…’ does not exist”

“File is too big”

“Native XML import error”

“Could not open file for writing…”

“Maximum execution time of 60 seconds exceeded”

“You don’t currently have access to that stage of the workflow”

“Failed Ajax request or invalid JSON returned.’

“500 Internal Server Error”

“PHP Fatal error: Allowed memory size of 134217728 bytes exhausted…”

“Out of memory”

“503 Service Unavailable”

“404 Not Found”

“Database connection failed”

“Error establishing a database connection”

“Syntax error in config file”

“Readers can’t view pdfs”

“Undefined index”

“Invalid argument supplied for foreach()”

“Cannot modify header information – headers already sent”

“Session_start(): Cannot start session when headers already sent”

“Uncaught exception ‘PDOException'”

“PHP Fatal error: Uncaught PDOException”

“Invalid PDF structure”

“Error: Call to a member function fetch() on a non-object”

“The tar command is not available. Please correctly configure it in your”

“Invalid token”

“Invalid locale”

“Error: Call to undefined method…”

“Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP”

“Error: Call-time pass-by-reference has been removed”

“Cannot redeclare class”

“Too many redirects”

“Error: Maximum function nesting level of ‘100’ reached”

“Missing argument”

“Error: Call to a member function getPublishedMonographIds() on a non-object”

“Undefined property”

“Invalid file format”

“Error: Call to undefined method DatabaseManager::…”

“The requested URL was not found on this server”

“Error: Cannot use object of type stdClass as an array”

“Invalid request”

“Error: Class ‘XMLWriter’ not found”

“File upload exceeds the maximum size allowed”

“Error: Call to undefined function ‘simplexml_load_string'”

“Invalid data in submission”

“Cannot use a scalar value as an array”

“Error: Call to a member function getId() on null”

“Error: Class ‘DomDocument’ not found”

“The requested journal is not currently published”

“Error: Call to a member function getPublishedArticleIds() on a non-object”

“Invalid argument supplied for foreach()”

“Error: Class ‘ZipArchive’ not found”

“Error: Call to undefined function ‘curl_init'”

“Duplicate entry ‘Invalid locale'”


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