Fatal error: Uncaught exception 'Exception' with message ' in /var/www/b2b/system/library/db/mysqli.php on line 56

Exception: Error: Disk full (/tmp/#sql_3d2_1.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")<br />Error No: 1021<br />SELECT DISTINCT *, p.description AS name, d.name as nameov,
	(
	SELECT
		price
	FROM
		prices pd2
	WHERE
		pd2.stockid = p.stockid
		AND pd2.typeabbrev = 'A1'
		AND DATE(NOW()) BETWEEN pd2.startdate AND pd2.enddate
	LIMIT 1) AS price,
	(
	SELECT
		price
	FROM
		pricematrix ps
	WHERE
		ps.stockid = p.stockid
		AND ps.salestype = 'A1'
		AND (
			DATE(NOW()) BETWEEN ps.startdate AND ps.startdate
		)
	ORDER BY
		ps.price ASC
		LIMIT 1
	) AS special
FROM
	stockmaster p
LEFT JOIN product_description d on p.stockid = d.stockid
LEFT JOIN purchdata on p.stockid = purchdata.stockid
WHERE
	p.stockid = '0'

	 and discontinued <> 1  in /var/www/b2b/system/library/db/mysqli.php on line 56

Call Stack:
    0.0001     235040   1. {main}() /var/www/b2b/index.php:0
    0.0012     352536   2. start() /var/www/b2b/index.php:45
    0.0012     354120   3. require_once('/var/www/b2b/system/framework.php') /var/www/b2b/system/startup.php:130
    0.0079     538584   4. Front->dispatch() /var/www/b2b/system/framework.php:116
    0.0159     967304   5. Front->execute() /var/www/b2b/system/engine/front.php:28
    0.0159     967304   6. Action->execute() /var/www/b2b/system/engine/front.php:33
    0.0160     972096   7. call_user_func_array:{/var/www/b2b/system/engine/action.php:51}() /var/www/b2b/system/engine/action.php:51
    0.0160     972528   8. ControllerStartupRouter->index() /var/www/b2b/system/engine/action.php:51
    0.0161     973552   9. Action->execute() /var/www/b2b/catalog/controller/startup/router.php:36
    0.0162     980256  10. call_user_func_array:{/var/www/b2b/system/engine/action.php:51}() /var/www/b2b/system/engine/action.php:51
    0.0162     986336  11. ControllerProductProduct->index() /var/www/b2b/system/engine/action.php:51
    0.0188    1140408  12. Proxy->getProduct() /var/www/b2b/catalog/controller/product/product.php:183
    0.0188    1140760  13. Proxy->__call() /var/www/b2b/catalog/controller/product/product.php:183
    0.0188    1141896  14. call_user_func_array:{/var/www/b2b/system/engine/proxy.php:25}() /var/www/b2b/system/engine/proxy.php:25
    0.0188    1143072  15. Loader->{closure:/var/www/b2b/system/engine/loader.php:149-193}() /var/www/b2b/system/engine/proxy.php:25
    0.0189    1144664  16. call_user_func_array:{/var/www/b2b/system/engine/loader.php:180}() /var/www/b2b/system/engine/loader.php:180
    0.0189    1146112  17. ModelCatalogProduct->getProduct() /var/www/b2b/system/engine/loader.php:180
    0.0190    1147848  18. DB->query() /var/www/b2b/catalog/model/catalog/product.php:258
    0.0190    1147984  19. DB\MySQLi->query() /var/www/b2b/system/library/db.php:16