# \[IGN-15832\]System.perspective.download fails to download larger file **URL:** \ **Category:** Ignition\ **Tags:** perspective\ **Created:** [March 31, 2026, 6:38am UTC](https://forum.inductiveautomation.com/t/ign-15832-system-perspective-download-fails-to-download-larger-file/114795 "2026-03-31T06:38:45Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![nminchin](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nminchin/32/6911_2.png) [@nminchin](https://forum.inductiveautomation.com/u/nminchin)\ **Post date:** [March 31, 2026, 6:38am UTC](https://forum.inductiveautomation.com/t/ign-15832-system-perspective-download-fails-to-download-larger-file/114795/1 "2026-03-31T06:38:45Z")
I’ve got a script to generate an excel file from a Perspective Table data set, and when I have 158 rows, the download is ok. When I have 192 rows, I get the following error and I don’t get a download: ```python 16:58:56.132 [connection-worker-7] WARN com.inductiveautomation.ignition.client.gateway_interface.GatewayConnectionManager -- Failed to deserialize push notification payload for listener 'com.inductiveautomation.perspective.show-error' com.inductiveautomation.ignition.common.rpc.proto.ProtoSerializationException: Unable to deserialize com.inductiveautomation.perspective.common.messages.ErrorNotification; no deserializer found at com.inductiveautomation.ignition.common.rpc.proto.BuiltinAdapters.fallbackDeserializer(BuiltinAdapters.java:447) at com.inductiveautomation.ignition.common.rpc.proto.ProtoRpcSerializer.decodeValue(ProtoRpcSerializer.java:257) at com.inductiveautomation.ignition.common.rpc.proto.ProtoRpcSerializer.decodeValue(ProtoRpcSerializer.java:242) at com.inductiveautomation.ignition.common.rpc.proto.ProtoRpcSerializer.protoDecode(ProtoRpcSerializer.java:363) at com.inductiveautomation.ignition.common.rpc.proto.ProtoRpcSerializer.lambda$asPushNotificationDeserializer$1(ProtoRpcSerializer.java:446) at com.inductiveautomation.ignition.client.gateway_interface.AbstractGatewayConnection.fireInternal(AbstractGatewayConnection.java:3004) at com.inductiveautomation.ignition.client.gateway_interface.AbstractGatewayConnection.firePushNotificationInternal(AbstractGatewayConnection.java:2978) at com.inductiveautomation.ignition.client.gateway_interface.AbstractGatewayConnection.lambda$firePushNotifications$23(AbstractGatewayConnection.java:3034) at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(Unknown Source) at com.inductiveautomation.ignition.common.util.ExecutionQueue$PollAndExecute.run(ExecutionQueue.java:237) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.base/java.lang.Thread.run(Unknown Source) Caused by: java.lang.ClassNotFoundException: com.inductiveautomation.perspective.common.messages.ErrorNotification at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(Unknown Source) at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(Unknown Source) at java.base/java.lang.ClassLoader.loadClass(Unknown Source) at java.base/java.lang.Class.forName0(Native Method) at java.base/java.lang.Class.forName(Unknown Source) at org.apache.commons.lang3.ClassUtils.getClass(ClassUtils.java:1069) at org.apache.commons.lang3.ClassUtils.getClass(ClassUtils.java:1103) at com.inductiveautomation.ignition.common.rpc.proto.BuiltinAdapters.fallbackDeserializer(BuiltinAdapters.java:442) ... 12 common frames omitted ``` The most relevant part of the script is this: ```python exportData = system.dataset.toDataset(headersLayman, exportData) spreadsheet = system.dataset.toExcel(True, [exportData]) fileName = 'AuditLogExport_{}.xlsx'.format(system.date.format(system.date.now(), "yyyy-MM-dd HH:mm:ss")) system.perspective.download(fileName, spreadsheet) ``` I have error handling around my code and it prints any errors to the console, but this one doesn’t show up in the browser. I saw this appear in the Designer console when I tested it. ---
**Author:** ![nminchin](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nminchin/32/6911_2.png) [@nminchin](https://forum.inductiveautomation.com/u/nminchin)\ **Post date:** [March 31, 2026, 6:47am UTC](https://forum.inductiveautomation.com/t/ign-15832-system-perspective-download-fails-to-download-larger-file/114795/2 "2026-03-31T06:47:49Z")
Nevermind, it was a java error: ```python INFO Perspective.Designer.Workspace -- java.lang.IllegalArgumentException: The maximum length of cell contents (text) is 32767 characters ``` ---
**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\ **Post date:** [March 31, 2026, 4:34pm UTC](https://forum.inductiveautomation.com/t/ign-15832-system-perspective-download-fails-to-download-larger-file/114795/3 "2026-03-31T16:34:57Z")
> [@nminchin](#): > > `Caused by: java.lang.ClassNotFoundException: com.inductiveautomation.perspective.common.messages.ErrorNotification` For what it's worth, this shouldn't be happening. Is: > [@nminchin](#): > > `INFO Perspective.Designer.Workspace -- java.lang.IllegalArgumentException: The maximum length of cell contents (text) is 32767 characters` Something you saw in the designer's logs (eventually?) or did you have to go to the gateway to see it? ---
**Author:** ![nminchin](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nminchin/32/6911_2.png) [@nminchin](https://forum.inductiveautomation.com/u/nminchin)\ **Post date:** [March 31, 2026, 8:21pm UTC](https://forum.inductiveautomation.com/t/ign-15832-system-perspective-download-fails-to-download-larger-file/114795/4 "2026-03-31T20:21:58Z")
I added error handling for Java Throwable and then the more useful error showed up. I did also think that that first exception looked a bit suspect…