MT4 error code 3 Invalid_trade Parameters on EA - help!

Hi folks. Have a problem with an EA I wrote and have been updating. Works well on FXCM in placing pending orders, but inconsistently on Pepperstone. Have Googled the crap out the error, but found nothing helpful. Error shows up during live trading but not picked up by Strategy Tester. Doing my head in, so to speak.

So, the EA places buy stop and sell stop pending orders above or below current price on close of a bar on a M1 or M5 chart. On the Pepperstone platform (ECN), some of the orders are successful , but most fail with the above error. STOPS LEVEL is 0, and I write out the entry price, bid or ask, stop and relevant order detail. Entry price is always on the correct side of the bid/ask for entry, so I just don't get what it is. Have compared placed and failed trades and nothing jumps out.

Here's a sample of the error msg for a failed order:

Error in addOrder BUY. Error code = 3 PP = 9911.0, Ask = 9908.5, SL = 9886.3, TP = 0.0, Lotsize = 1.00. Risk Pct = 1.00%.

Reaching out to see if anyone else had encountered the same error or could offer pointers or a sharp stick to the eye if it's obvious of what might be up.

Thanks so much for any suggestions.

Brokers have different distances that pending orders stoploss and takeprofit can be set too some brokers have no limits, FXCM might allow pending orders to within 0 pips and Pepperstone may have a 5 pip limit, a word of caution often Demo accounts allow closer margins than Live accounts so what may work on a Demo may not work Live plus that distance can be increased just like spreads around volatile news events, the EA really needs to have that allowance written into it or set your Pending order TP or SL to a wider margin. I wrote this simple script to show STOP LEVELS it will give you the value in the top left of the chart.
Basically if you try to set a pending order below that value or open a pending order with a TP or SL below that Stop level the order will not be activated.

This sort of line of code can be seen in EA's that allow for spread and Stop level.
if(INCREMENT<MarketInfo(Symbol(),MODE_STOPLEVEL)+spread) INCREMENT=1+MarketInfo(Symbol(),MODE_STOPLEVEL)+spread;

Darn. Wanted to edit to fix the title of the thread in case someone else does a search, but seems I can't. Anyway, the actual message, and correct title for the error, should be invalid_trade_parameters. Just in case someone else searches on that exact text.

Thanks for the suggestion, cja. Already been there. Pepperstone appears to be 0.

Anyway, there's no double darn, but a small yippee because after more Google searches with different keywords I found some matches at www.stevehopwoodforex.com. What a good spot. After registering as a member I delved into the threads that mentioned this specific error and found a couple of suggestions.

The solution was that I had to NormalizeDouble the lot, stop order and take profit values for each OrderSend. Amended the EA and compiled clean and now it works. All good.